Updates
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created_by: 8mag
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created_date: 2020-09-23 20:52:09.111272
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updated_by: skybber
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updated_date: 2021-01-09 10:07:13.555047
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updated_date: 2022-02-05 18:37:47.120402
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---
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Otevřená hvězdokupa vhodná spíše pro triedr jako dalekohled.
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created_by: skybber
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created_date: 2021-01-09 10:07:13.303600
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updated_by: skybber
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updated_date: 2021-01-09 10:07:13.555255
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updated_date: 2022-02-05 18:37:47.120574
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---
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Je extrémně velkou skupinou 20 hvězd, ne dobře rozlišitelných od hvězdného pole. Její 5 nejjasnějších hvězd tvoří zkřivený řetězec s hvězdou ο1 CMa (3,79mag) na severním konci. Wolf-Rayetových proměnná hvězda EZ Canis Majoris, hned severně od ο1 CMa, je pravděpodobně skutečným členem kupy.
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Je extrémně velkou skupinou 20 hvězd, ne dobře rozlišitelných od hvězdného pole. Její 5 nejjasnějších hvězd tvoří zkřivený řetězec s hvězdou ο1 CMa (3,79mag) na severním konci. Wolf-Rayetových proměnná hvězda EZ Canis Majoris, hned severně od ο1 CMa, je pravděpodobně skutečným členem kupy.
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created_by: 8mag
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created_date: 2020-09-23 20:52:09.103702
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updated_by: skybber
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updated_date: 2021-01-09 10:08:17.710722
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updated_date: 2022-02-05 18:51:13.287305
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---
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Velmi rozsáhlá otevřená hvězdokupa viditelná pouhým okem jako matná skvrnka v Mléčné dráze. Označuje "chlup" na konci ocasu Velkého psa. V dalekohledu se jedná o kostru velkého seskupení "Y" sestávajícího ze čtyř hvězd 5-6mag, které jsou mírně vysunuté z kupy na SV. Prostřední hvězda "Y" má označení Dunlop 47. Jde o širokou modro-žlutou dvojhvězdu, jejíž složky jasnosti 5,5mag a 7,6mag jsou odděleny 99". Celá tato oblast stojí za binokulární procházku.
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Velmi rozsáhlá otevřená hvězdokupa viditelná pouhým okem jako matná skvrnka v Mléčné dráze. Označuje "chlup" na konci ocasu Velkého psa. V dalekohledu se jedná o kostru velkého seskupení "Y" sestávajícího ze čtyř hvězd 5-6mag, které jsou mírně vysunuté z kupy na SV. Prostřední hvězda "Y" má označení Dunlop 47. Jde o širokou modro-žlutou dvojhvězdu, jejíž složky jasnosti 5,5mag a 7,6mag jsou odděleny 99". Celá tato oblast stojí za binokulární procházku.
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---
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name:
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rating: 8
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rating: 6
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references:
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created_by: 8mag
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created_date: 2020-09-23 20:52:02.730235
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updated_by: skybber
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updated_date: 2020-11-04 12:39:17.768028
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updated_date: 2022-02-06 16:11:28.078300
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---
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Otevřená hvězdokupa celkové jasnosti 7,5mag, tvořená 60 hvězdami, z nichž nejjasnější dosahuje 9,31mag. Je pozorována uvnitř trojúhelníku, který tvoří hvězdy 8mag. Hvězdokupa je umístěna ve velmi bohatém hvězdném poli a je ponořena v emisní mlhovině **IC 410**, která je bez mlhovinového filtru velmi těžko pozorovatelná - zjevuje se slabá, velká a velmi mlhavá. Použítím O-III filtru se ukáže ve tvaru působivého písmene "C", které zabírá zhruba půl stupně. Mlhovina je výraznější na SZ rozhraní kupy.
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created_by: skybber
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created_date: 2020-09-23 20:52:11.146255
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updated_by: skybber
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updated_date: 2020-11-04 12:39:17.768363
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updated_date: 2022-02-06 15:57:58.237761
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---
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V dalekohledu můžeme pozorovat většinu členů hvězdokupy NGC 1893 - 50 v rozmezí 9-13mag. Největší koncentrace je pozorována v severní části ve tvaru jakéhosi "diamantu", se dvěma rozšířeními na severu a východě, probíhajícími další tři tucty hvězd.
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V dalekohledu můžeme pozorovat většinu členů hvězdokupy NGC 1893 - 50 v rozmezí 9-13mag. Největší koncentrace je pozorována v severní části ve tvaru jakéhosi "diamantu", se dvěma rozšířeními na severu a východě, probíhajícími další tři tucty hvězd.
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---
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name:
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rating: 4
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rating: 5
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references:
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created_by: 8mag
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created_date: 2020-09-23 20:52:04.509601
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updated_by: skybber
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updated_date: 2021-01-09 15:10:52.708965
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updated_date: 2022-02-05 19:24:57.468322
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---
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@ -4,6 +4,6 @@ rating: 1
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created_by: skybber
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created_date: 2021-01-09 15:10:52.323145
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updated_by: skybber
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updated_date: 2021-01-09 15:10:52.709232
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updated_date: 2022-02-05 19:24:57.468473
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---
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V dalekohledu nad 150 mm a při 100x zvětšení se zobrazí poměrně jasná, kompaktní, malá hromádka. Tvoří ji pět hvězd 10-11mag, deset 12mag a pár tuctů slabších, které jsou koncentrované kolem dvou nejjasnějších členů. kupa je rozdělena do dvou nepravidelných hvězdných řetězců.
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V dalekohledu nad 150 mm a při 100x zvětšení se zobrazí poměrně jasná, kompaktní, malá hromádka. Tvoří ji pět hvězd 10-11mag, deset 12mag a pár tuctů slabších, které jsou koncentrované kolem dvou nejjasnějších členů. kupa je rozdělena do dvou nepravidelných hvězdných řetězců.
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name:
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rating: 1
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references:
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created_by: skybber
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created_date: 2022-02-06 13:45:20.320007
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updated_by: skybber
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updated_date: 2022-02-06 13:45:21.247898
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---
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Leží něco přes 3/4° severně od Mu Orionis a vyžaduje malé zvětšení, aby byla vůbec vidět. V jejím středu je slabá hvězda a několik dalších na jejím okraji.
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---
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aperture: 400/500
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rating: 1
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created_by: skybber
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created_date: 2022-02-06 13:45:21.021300
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updated_by: skybber
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updated_date: 2022-02-06 13:52:03.344941
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---
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20-25 slabých hvězd mag 13-15 při 220x nad rozsáhlým zjasněním. Nachází se v neúplném kruhu několika jasnějších hvězd 11-12 mag o průměru asi 8'.
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created_by: 8mag
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created_date: 2020-09-23 20:52:04.520922
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updated_by: skybber
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updated_date: 2021-01-09 14:47:42.893076
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updated_date: 2022-02-05 19:07:18.360252
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---
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Otevřená hvězdokupa (8,6mag) nacházející se ve vzdálenosti 11 000 ly směrem k okrajovým částech Galaxie. Je stará dvě miliardy let. Na obloze je slabším společníkem mnohem rozsáhlejší otevřené hvězdokupy M35. Oproti ní však leží v asi 6x větší vzdálenosti.
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Otevřená hvězdokupa (8,6mag) nacházející se ve vzdálenosti 11 000 ly směrem k okrajovým částech Galaxie. Je stará dvě miliardy let. Na obloze je slabším společníkem mnohem rozsáhlejší otevřené hvězdokupy M35. Oproti ní však leží v asi 6x větší vzdálenosti.
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created_by: skybber
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created_date: 2021-01-09 14:47:42.704192
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updated_by: skybber
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updated_date: 2021-01-09 14:47:42.893451
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updated_date: 2022-02-05 19:07:18.360485
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---
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V dalekohledu je velmi zhuštěnou, bohatou sbírkou slabých hvězd, kontrastní pěkně s jasnější M35. Díky množství hvězd blízko centra má zjev uvolněné kulové hvězdokupy. Oproti mlhavé pozadí můžeme rozlišit 50 hvězd jasnosti 13mag a slabších (na JV rozhraní je hvězda 10,5mag). Několik hvězdných řetězců se šíří z kupy: jeden na západním rozhraní se připojuje na JZ, další se připojuje ze SV rozhraní na východní stranu směrem k M35.
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V dalekohledu je velmi zhuštěnou, bohatou sbírkou slabých hvězd, kontrastní pěkně s jasnější M35. Díky množství hvězd blízko centra má zjev uvolněné kulové hvězdokupy. Oproti mlhavé pozadí můžeme rozlišit 50 hvězd jasnosti 13mag a slabších (na JV rozhraní je hvězda 10,5mag). Několik hvězdných řetězců se šíří z kupy: jeden na západním rozhraní se připojuje na JZ, další se připojuje ze SV rozhraní na východní stranu směrem k M35.
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created_by: 8mag
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created_date: 2020-09-23 20:52:03.241451
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updated_by: skybber
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updated_date: 2020-09-23 20:52:03.241478
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updated_date: 2022-02-06 20:11:31.717166
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---
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Jedna z méně známých otevřených hvězdokup v souhvězdí, skrývající 30 členů z nichž nejjasnější dosahuje 7,3mag. Celková jasnost této výrazné OH je sice 5,4mag, takže je vidět i v triedru, ale neposkytuje příliš působivý pohled ani ve středních amatérských dalekohledech: ukáží se dva tucty volně rozložených hvězd 8-10mag, které tvoří jakési písmeno "U", asi 3.4 stupně JJZ od ψ Aur.
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---
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name:
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rating: 4
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rating: 5
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references:
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created_by: 8mag
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created_date: 2020-09-23 20:52:01.500594
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updated_by: skybber
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updated_date: 2021-01-09 15:11:38.405415
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updated_date: 2022-02-05 19:25:26.553735
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name:
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rating: 6
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references:
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created_by: skybber
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created_date: 2022-02-06 12:08:13.945765
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updated_by: skybber
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updated_date: 2022-02-06 12:08:14.422906
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---
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John Herschel objevil NGC 2439 = h3094 28. ledna 1835 a zaznamenal "hvězdokupu asi 150 hvězd, B, pL, p bohatou, ne o moc více koncentrovanou do středu, průměr 8', má jednu hvězdu 8. mag (místo obsazeno), jednu červenou 9. mag, ostatní 12..14. mag.".
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---
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aperture: 400/500
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rating: 1
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created_by: skybber
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created_date: 2022-02-06 12:07:01.459452
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updated_by: skybber
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updated_date: 2022-02-06 12:07:13.839652
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---
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220x, 70 hvězd viditelných v poli 10'. Jasná, poměrně velká, protáhlá na SZ. Bohatá, příjemná hvězdokupa, jejíž součástí je R Puppis 6,7 mag na severovýchodním okraji. Asi 1' JZ a 2' JV od R Puppis jsou dvě jednoduché, ale nápadné dvojhvězdy stejně vzdálené, s podobnými magnitudami, ale s kolmou orientací (N-S a V-Z). Dvojice 1,7' SSV je PRO 41 (9,2/10,3 na 12"). Tyto široké dvojhvězdy tvoří nápadnou skupinu a jsou součástí eliptického obrysu hvězd s prázdnotou uprostřed. Velmi neobvyklý vzhled!
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---
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name: Motýl albínek
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rating: 4
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rating: 6
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references:
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created_by: 8mag
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created_date: 2020-09-23 20:52:03.597395
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updated_by: skybber
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updated_date: 2020-10-01 17:04:30.340447
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updated_date: 2022-02-06 12:09:02.881830
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created_by: skybber
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created_date: 2020-09-23 20:52:12.579804
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updated_by: skybber
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updated_date: 2020-10-01 17:04:30.340715
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updated_date: 2022-02-06 12:09:02.881982
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---
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Nápadný oválný disk nazelenalé barvy uprostřed s nápadným zjasněním.
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Nápadný oválný disk nazelenalé barvy uprostřed s nápadným zjasněním.
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created_by: skybber
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created_date: 2020-09-23 20:52:12.595322
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updated_by: skybber
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updated_date: 2020-10-01 17:04:30.340865
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updated_date: 2022-02-06 12:09:02.882050
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---
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450x, [OIII] filtr, 6m7
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450x, [OIII] filtr, 6m7
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Silně strukturovaná PN. Jasná centrální část ve tvaru písmene U otevřené na JZ. Na JZ a SV přiléhají plošné zjasnění. Další část PN je mírně odsazená ve směru JZ. Zdá se, že krátká a úzká vlákna vytékají z hlavního tělesa ve směru V a SV, vlákna se po několika obloukových sekundách difuzně ztrácí.
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name:
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rating: 4
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rating: 5
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references:
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created_by: 8mag
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created_date: 2020-09-23 20:52:03.641671
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updated_by: skybber
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updated_date: 2021-02-06 10:37:12.197656
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updated_date: 2022-02-06 12:10:09.015077
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created_by: skybber
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created_date: 2021-02-06 10:37:11.875371
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updated_by: skybber
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updated_date: 2021-02-06 10:37:12.197809
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updated_date: 2022-02-06 12:10:09.015232
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---
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V dalekohledu skupinka 30 hvězd 10-12mag rozmístěných nepravidelně. Zhuštění naJV a SZ straně jsou spojeny bohatým hvězdným proudem táhnoucím se napříč centrem kupy. Jižně od centra můžeme vidět bezhvězdnu prázdnotu.
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V dalekohledu skupinka 30 hvězd 10-12mag rozmístěných nepravidelně. Zhuštění naJV a SZ straně jsou spojeny bohatým hvězdným proudem táhnoucím se napříč centrem kupy. Jižně od centra můžeme vidět bezhvězdnu prázdnotu.
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name:
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rating: 4
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rating: 5
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references:
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created_by: 8mag
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created_date: 2020-09-23 20:52:01.135566
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updated_by: skybber
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updated_date: 2021-02-06 10:32:46.399330
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updated_date: 2022-02-06 12:10:40.783397
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created_by: 8mag
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created_date: 2020-09-23 20:52:02.807601
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updated_by: skybber
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updated_date: 2021-01-19 20:50:42.834163
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updated_date: 2022-02-09 19:00:37.820870
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created_by: skybber
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created_date: 2020-09-23 20:52:02.271900
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updated_by: skybber
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updated_date: 2020-09-23 20:52:02.271925
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updated_date: 2022-02-09 18:54:27.461400
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---
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created_by: skybber
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created_date: 2020-09-23 20:52:10.532944
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updated_by: skybber
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updated_date: 2020-09-23 20:52:10.532963
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updated_date: 2022-02-09 18:54:27.461593
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---
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257x, pro 6m3
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257x, pro 6m3
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galaxie je největším členem "boxu“, tj člen velmi zajímavého, úzkého galaxiového kvarteta HCG 61. NGC 4173 je nejzajímavější galaxie z ní, i když je nejslabší.
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---
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name:
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rating: 4
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rating: 6
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references:
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created_by: 8mag
|
||||
created_date: 2020-09-23 20:52:05.804266
|
||||
updated_by: skybber
|
||||
updated_date: 2020-09-23 20:52:05.804299
|
||||
updated_date: 2022-02-09 18:45:49.834709
|
||||
---
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -1,9 +1,9 @@
|
|||
---
|
||||
name: Supernova z roku 1006
|
||||
name: SN 1006
|
||||
constellation: Lup
|
||||
created_by: 8mag
|
||||
created_date: 2020-09-23 20:52:21.938732
|
||||
updated_by: 8mag
|
||||
updated_date: 2020-09-23 20:52:21.938750
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:57:15.999122
|
||||
---
|
||||
v souhvězdí v minulosti vzplanula nejjasnější zaznamenána supernova v lidských dějinách. Všimli si ji tak obyvatelé Číny a Japonska, jakož i Blízkého východu a Evropy. Když se na jaře v roce 1006 poprvé na obloze objevila, byla asi tak jasná jako Mars v opozici. Během několika týdnů však hravě překonala Venuši a zjasnila se až na -9,5mag, což odpovídá jasu Měsíce v první čtvrti. Supernova byla viditelná následující dva roky, na krátký čas dokonce i přes den. Dnes na tomto místě pozorujeme už jen mračno trosek po dávné hvězdné explozi.
|
||||
v souhvězdí v minulosti vzplanula nejjasnější zaznamenána supernova v lidských dějinách. Všimli si ji tak obyvatelé Číny a Japonska, jakož i Blízkého východu a Evropy. Když se na jaře v roce 1006 poprvé na obloze objevila, byla asi tak jasná jako Mars v opozici. Během několika týdnů však hravě překonala Venuši a zjasnila se až na -7,5mag, což odpovídá jasu Měsíce v první čtvrti. Supernova byla viditelná následující dva roky, na krátký čas dokonce i přes den. Dnes na tomto místě pozorujeme už jen mračno trosek po dávné hvězdné explozi.
|
||||
|
|
@ -4,6 +4,6 @@ constellation: Ser
|
|||
created_by: 8mag
|
||||
created_date: 2020-09-23 20:52:21.458340
|
||||
updated_by: skybber
|
||||
updated_date: 2020-09-23 20:52:21.458365
|
||||
updated_date: 2022-02-08 15:29:35.728179
|
||||
---
|
||||
těsná dvojhvězda pozorovaná v poli Mléčné dráhy popredkávanom tmavými mlhovinami. Složky 6,6mag a 9,1mag v odstupu 2,1" jsou velmi dobrým testem kvality pro malé dalekohledy a potřebují minimálně 150-násobné zvětšení.
|
||||
těsná dvojhvězda pozorovaná v poli Mléčné dráhy protkaném tmavými mlhovinami. Složky 6,6mag a 9,1mag v odstupu 2,1" jsou velmi dobrým testem kvality pro malé dalekohledy a potřebují minimálně 150-násobné zvětšení.
|
||||
|
|
@ -0,0 +1,8 @@
|
|||
---
|
||||
name: Volans
|
||||
created_by: skybber
|
||||
created_date: 2022-02-07 15:15:59.397003
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:16:10.460928
|
||||
---
|
||||
A small and relatively obscure constellation in the southern sky that doesn't stand out much near the rich part of the Milky Way. It is located just near the south celestial pole under the bright star Canopus, between the keel star Miaplacidus and the Great Magellanic Cloud. There are no interesting objects in the constellation, with only one deep-sky spiral galaxy of 11th magnitude, seen from above, attracting attention.
|
||||
|
|
@ -0,0 +1,8 @@
|
|||
---
|
||||
name: Vulpecula
|
||||
created_by: skybber
|
||||
created_date: 2022-02-07 15:15:09.045046
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:15:09.045364
|
||||
---
|
||||
A small and faint constellation of the northern sky south of the Swan, just off Albireo, north of the Arrow and the Dolphin. The Fox lies in the eastern stream of the summer Milky Way. Although the latter is not exceptionally bright in this region, it contains an abundant surplus of 7th to 10th magnitude stars. The star clouds are good for sweeping through with a trier, and there are some nice objects to be discovered. The constellation contains a relatively large number of open clusters. The most impressive in the telescope's field of view is NGC 6940 , while the well-known open cluster Collinder 399, simply called "The Arm", is for any binoculars. There are also relatively bright nebulae, binaries, triple stars and, at the very eastern edge of the constellation, a few galaxies. The most famous object, however, is the planetary nebula M27 , one of the largest and brightest planetary nebulae, amazing in any telescope, from the Trident to the 500mm Dobsonian. Even with the smallest telescope, you can see a hint of its shape, from which it is also called
|
||||
|
|
@ -3,6 +3,7 @@ name: Herschel 3750
|
|||
constellation: Lep
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:50:33.198101
|
||||
---
|
||||
This tight yellow-white-blue double star was named by William Herschel as "the most beautiful double star". It can be easily verified with a smaller telescope. The components reach a brightness of 4.7mag and 8.4mag, and lie 4.2" apart.
|
||||
|
|
@ -3,6 +3,7 @@ name: Herschel 3780
|
|||
constellation: Lep
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:48:40.323623
|
||||
---
|
||||
a small cluster (NGC 2017), whose main members are listed in the Herschel catalogue. The small telescope reveals a 6mag star with four companions of 8mag to 10mag. In a larger telescope, two of the components can be verified to be close binaries. The fainter 12mag star that completes the group also appears.
|
||||
|
|
@ -3,6 +3,7 @@ name: Herschel 4788
|
|||
constellation: Lup
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:57:51.588207
|
||||
---
|
||||
a double star that is a good test for a 100-150 mm telescope. On a calm night, this unevenly bright pair of white and yellow stars appears as two disks in contact. However, if there is any turbulence in the atmosphere, the stars merge into one elongated blob. They lie 2.2" apart and their luminosities are 4.7mag and 6.7mag respectively.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Hind's Crimson Star (R Lep)
|
||||
constellation: Lep
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:50:07.807799
|
||||
---
|
||||
Like Mira Ceti, it is a red giant that changes its brightness typically between 6mag and 11.7mag over a 430-day period. The total difference between maximum and minimum corresponds to a difference in brightness of 300 times. There is also a long secondary cycle - every 40 years the star brightens to 5.5mag. At its brightest, it resembles a deep red drop of blood in a dark sky and is visible to the naked eye. It is located near μ Lep (3.31mag). R Leporel is a giant star with a low surface temperature of about 2,700 K, with carbon molecules in its atmosphere that absorb shortwave radiation and a large dust cloud surrounding it. All of this accounts for the star's red colour, which stands out especially at times of maximum brightness. The star is visible to the trier, but binoculars are needed to see the colour clearly.
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
---
|
||||
name: Hindova karmínová hviezda (R Lep)
|
||||
constellation: Lep
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
---
|
||||
|
|
@ -3,6 +3,7 @@ name: N Hya
|
|||
constellation: Hya
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:44:55.396720
|
||||
---
|
||||
a nice almost equally bright pair of yellow 5.8mag, 5.9mag components, easily distinguishable in small telescopes, the components lie at a distance of 9.2". In the same field of view we can further see a single red-orange star, 8' to the northeast.
|
||||
|
|
@ -3,6 +3,7 @@ name: P Hya
|
|||
constellation: Hya
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:44:35.449849
|
||||
---
|
||||
easily distinguishable 5mag and 6.9mag components at 4' separation. Through a 60mm diameter telescope, we find that the fainter component has a 9th magnitude guide at a distance of 9.6".
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Plaskett star
|
||||
constellation: Mon
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 10:13:55.332535
|
||||
---
|
||||
a spectral binary star of sixth magnitude discovered in 1922 by Canadian astronomer and director of the Victoria Observatory John Stanley Plaskett. It is the most massive binary star known.
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
---
|
||||
name: Plaskettova hviezda
|
||||
constellation: Mon
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
---
|
||||
|
|
@ -3,6 +3,7 @@ name: R Hydrae
|
|||
constellation: Hya
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:44:10.602134
|
||||
---
|
||||
a red giant, one of the most famous Mira Ceti type variable stars. It varies in apparent brightness from 3.5mag to 10.9mag over a period of 389.6 days, first noticed by astronomers in the 17th century. However, the period has probably shortened by about 100 days since then. It is about 700 light-years away and at its greatest peak exceeds the luminosity of 7,000 Suns.
|
||||
|
|
@ -3,6 +3,7 @@ name: R LMi
|
|||
constellation: LMi
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:44:16.394014
|
||||
---
|
||||
Mira-type variable star, similar in many ways to the red supergiant R Leonis. It has a period of about 372 days and varies in brightness from 6.3mag to 13.2mag, thus disappearing from the range of small telescopes. It lies 45' southeast of the star 13 LMI, which has a brightness of 6.2mag.
|
||||
|
|
@ -3,6 +3,7 @@ name: SN1987A
|
|||
constellation: Dor
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-05 20:15:51.376551
|
||||
---
|
||||
a bright supernova that shone in the Large Magellanic Cloud in the vicinity of the Tarantula Nebula on 23 February 1987, reaching its maximum of 2.8 mag. Thus, after 383 years since Kepler's supernova, at least residents of the southern hemisphere could marvel at another supernova visible to the naked eye. It shone in the sky for 10 months, but is now very faint. It probably left behind a pulsar that has not yet been found.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: SN 1006
|
||||
constellation: Lup
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:56:39.704566
|
||||
---
|
||||
the brightest supernova ever recorded in human history. It was noticed by the inhabitants of China and Japan, as well as the Middle East and Europe. When it first appeared in the sky in the spring of 1006, it was about as bright as Mars in opposition. Within a few weeks, however, it easily surpassed Venus, brightening to -7.5mag, equivalent to the brightness of the Moon in the first quarter. The supernova was visible for the next two years, even briefly during the day. Today, all we see at this site is a cloud of debris from the ancient stellar explosion.
|
||||
|
|
@ -3,6 +3,7 @@ name: S Doradus
|
|||
constellation: Dor
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-05 20:16:22.631677
|
||||
---
|
||||
an exceptionally luminous star that surpasses the Sun by at least a million times in luminosity. It is one of the brightest stars ever. However, because of its distance, we cannot see it with the naked eye, and we only perceive it as a faint star whose brightness varies between 8mag and 11.5mag because it is an eclipsing variable star. Its components are between 1 400 and 1 200 times the diameter of our Sun. Its absolute brightness is about -11.
|
||||
|
|
@ -3,6 +3,7 @@ name: Struve 1104
|
|||
constellation: Pup
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 12:02:25.281293
|
||||
---
|
||||
a beautiful but tight pair of golden yellow stars, but one that requires good seeing to see clearly. The 6.4mag and 7.5mag brightness components are separated by 2.1".
|
||||
|
|
@ -3,6 +3,7 @@ name: Struve 1441
|
|||
constellation: Sex
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 12:03:57.843786
|
||||
---
|
||||
a tight, attractive pair that can be resolved with binoculars with a lens diameter of about 100mm at a distance of 2.6". The brighter orange component has a brightness of 6.4mag, the fainter blue 9.9mag.
|
||||
|
|
@ -3,6 +3,7 @@ name: Struve 2303
|
|||
constellation: Ser
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-08 15:29:15.659075
|
||||
---
|
||||
a close binary star observed in a Milky Way field of dark nebulae. The 6.6mag and 9.1mag components at 2.1" are a very good quality test for small telescopes and need at least 150x magnification.
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
---
|
||||
name: Supernova z roku 1006
|
||||
constellation: Lup
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
---
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Trapezium
|
||||
constellation: Ori
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:58:25.913065
|
||||
---
|
||||
The "theta system", lies at the heart of the Great Nebula itself in Orion and is one of the most famous multiple stars in the entire sky. Its four stars, ranging in brightness from 5mag to 8mag, form a quadrangle called Trapezium. Several 11mag stars within and around the quadrangle are undoubtedly physically part of the Trapezium system. What's more, within the 5' area of Trapezium are over 400 very faint stars, extremely young objects recently born from huge clouds of gas and dust. The stars of Trapezium are extremely young, approximately 30,000 years old.
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
---
|
||||
name: Trapéz
|
||||
constellation: Ori
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
---
|
||||
|
|
@ -3,6 +3,7 @@ name: V Hya
|
|||
constellation: Hya
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:45:17.219413
|
||||
---
|
||||
a rare example of a carbon star. It's a low-temperature red giant that produces carbon. The star is very red, so it can't be mistaken for any other star. But it has one catch: it changes its brightness irregularly between 6th and 12th mag in two main periods - 18 months and 18 years.
|
||||
|
|
@ -3,6 +3,7 @@ name: Wolf 359
|
|||
constellation: Leo
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:42:02.875256
|
||||
---
|
||||
a faint star with a brightness of 13.7mag, named in honour of Max Wolf, working at Heidelburg University in the early 20th century, who discovered its proper motion. It moves 4.71" across the sky every year. One reason for this apparent movement is its proximity to us. It lies at a distance of just 7.86 light years from the Sun, making it our third closest star after Proxima Centauri and Barnard's Star in Hadonos.
|
||||
|
|
@ -3,6 +3,6 @@ name: Wolf 457
|
|||
constellation: Dra
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-05 20:26:44.522159
|
||||
---
|
||||
|
|
|
|||
|
|
@ -3,6 +3,7 @@ name: α Dor
|
|||
constellation: Dor
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-05 20:14:22.786832
|
||||
---
|
||||
the brightest star in the constellation has an apparent brightness of 3.47mag. In reality, it is a close binary because 77.7" from the main component is a companion of 9.8mag brightness. It lies at a distance of 176 light years.
|
||||
|
|
@ -3,6 +3,7 @@ name: κ Lep
|
|||
constellation: Lep
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:48:00.636273
|
||||
---
|
||||
this binary is made up of 4.5mag and 7.4mag components, which lie at an angular separation of 2.6". To resolve them, we need a telescope with a lens diameter of at least 15 cm. At about 115x magnification, both components appear white. It is only in a larger telescope that the guide becomes blue.
|
||||
|
|
@ -3,6 +3,7 @@ name: Rigel (β Ori)
|
|||
constellation: Ori
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:54:13.610367
|
||||
---
|
||||
is usually the brightest star in the constellation, only occasionally surpassed by Betelgeuse during its peak. At 0.14mag, it is the seventh brightest star in the sky. It is a supernova of spectral type B8, so its blue-white colour can be clearly seen with the naked eye. Rigel is 78 times bigger and 12 000 times brighter than our Sun and lies 860 light years away.
|
||||
|
|
@ -3,6 +3,7 @@ name: Nihal (β Lep)
|
|||
constellation: Lep
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:47:07.074593
|
||||
---
|
||||
the triple stars. For a star with a brightness of 2.8mag, there are two components at a distance of 2.5" and 64", both with a brightness of 11mag. The more distant component is only an optical guide. The main star is 160 light years away.
|
||||
|
|
@ -3,6 +3,7 @@ name: Mintaka (δ Ori)
|
|||
constellation: Ori
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:55:37.471347
|
||||
---
|
||||
the true blue-white star of the belt near the celestial equator. This is one of the easiest pairs to distinguish - a telescope with a 5 cm diameter lens will suffice. We'll see the pale blue 6.9mag companion next to the main component at a distance of 52.6". This is probably a real star pair, even though the components are half a light year apart. So their mutual orbital period could be a million years. The system lies at a distance of 2,350 light years. The main component is also a variable star, but with a very small change in brightness (about 2.2 mag).
|
||||
|
|
@ -3,6 +3,7 @@ name: Arneb (α Lep)
|
|||
constellation: Lep
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:46:37.142187
|
||||
---
|
||||
the brightest star in the constellation (2.58mag), 2200 light years away. It is a supergiant 32,000 times brighter than the Sun. At an angular distance of 36" it contains a faint 11mag guide star.
|
||||
|
|
@ -3,6 +3,7 @@ name: λ Ori
|
|||
constellation: Ori
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:56:30.122062
|
||||
---
|
||||
the white companions have a brightness of 3.5mag and 5.6mag, their mutual spacing is 4.4". The other two, bluish companions lie 28" and 78" respectively from this pair. λ Ori denotes the head of Orion and forms an interesting triangle with π-1 and π-2 Ori. Both reach 4th sidereal magnitude.
|
||||
|
|
@ -3,6 +3,7 @@ name: ι Ori
|
|||
constellation: Ori
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:56:06.902242
|
||||
---
|
||||
nice triple star suitable for small telescopes. Next to the main white component (2.8mag) lies a pale blue 7.3mag guide at a distance of 11.3". Another, reddish companion 11mag is observed at a distance of 50" from this pair. The trier shows the even wider binary Struve 747 nearby, which is made up of bright 4.8 and 5.7mag components.
|
||||
|
|
@ -3,6 +3,7 @@ name: β Dor
|
|||
constellation: Dor
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-05 20:15:07.042098
|
||||
---
|
||||
A variable Cepheid that reaches a maximum brightness of 3.8mag and decreases to 4.6mag at minimum with a period of 9.84 days. This yellow-white giant is about 1,000 light-years away. A suitable comparison star is Delta Dor, which reaches a brightness of 4.35 mag.
|
||||
|
|
@ -3,6 +3,7 @@ name: σ Ori
|
|||
constellation: Ori
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:57:17.186221
|
||||
---
|
||||
already with a telescope with a 5 cm objective diameter we can detect two guides in the main white component 3.81mag. The first 6mag lies at a distance of 41", the second 7mag is separated by a distance of 13" . In a telescope with a lens diameter of about 15 cm, a companion 10mag is added at a distance of 11". Another 6mag companion lies within 0.2" of the main component, but it is the only one physically related to the main component.
|
||||
|
|
@ -3,6 +3,7 @@ name: Alnitak (ζ Ori)
|
|||
constellation: Ori
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:55:07.438010
|
||||
---
|
||||
the left star of Orion's belt is actually a triple star. Near the main component of 1.9mag is a 4.2mag companion at a distance of 2.7", and at an angular distance of 57" is another 9mag star that probably only projects into the vicinity of Alnitak. All components have a blue-white hue.
|
||||
|
|
@ -3,6 +3,7 @@ name: γ Lep
|
|||
constellation: Lep
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:47:35.226621
|
||||
---
|
||||
this binary splits into two components in the triad, one reaching 3.7mag (yellow) and the other 6.3mag (orange). The components are 96.3" apart, separated by about 29 light years from Earth. The star belongs to the motion cluster of the Big Dipper.
|
||||
|
|
@ -3,6 +3,7 @@ name: Betelgeuse (α Ori)
|
|||
constellation: Ori
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:54:38.243093
|
||||
---
|
||||
this luminous red giant is a semi-regular variable star whose brightness varies between 0.4mag and 1.3mag over a period of about 5.7 years. However, it is more orange in colour in the triad. Betelgeuse is one of the largest stars visible to the naked eye. If it were at the position of the Sun, its edge would extend to the asteroid belt. It lies 500-600 light years away.
|
||||
|
|
@ -3,6 +3,7 @@ name: Tejat Prior (η Gem)
|
|||
constellation: Gem
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:13:55.251317
|
||||
---
|
||||
red giant, a bright semi-regular variable star with magnitude variations from 3.1 to 3.9 over a period of about 223 days. At a distance of 1.4", the guide has a magnitude of 8.8. A good comparison star is μ Gem. It lies at a distance of 700 light years.
|
||||
|
|
@ -3,6 +3,7 @@ name: 5 Lyn
|
|||
constellation: Lyn
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:52:20.717778
|
||||
---
|
||||
triple constellation, even in a smaller telescope, is a nice, wide pair of yellow 5.3mag and blue 9.8mag components that lie 31.4" apart. A third component of 7.9mag lies at a distance of 96". The binary 6 Lyn and two other wide pairs lie nearby. The one that lies one degree northeast of 5 Lyn is made up of an orange and blue component, the other is made up of two white components.
|
||||
|
|
@ -3,6 +3,7 @@ name: ε Mon
|
|||
constellation: Mon
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 10:12:43.137174
|
||||
---
|
||||
the main star with a brightness of 4.5mag has a guide star with a brightness of 6.5mag at a distance of 13.4", which we can find with a smaller telescope. Both components are yellow. At a distance of 93.7" from them, we can detect a pale blue companion of 12.7mag with a larger telescope.
|
||||
|
|
@ -3,6 +3,7 @@ name: β Mon
|
|||
constellation: Mon
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 10:13:05.317779
|
||||
---
|
||||
the brightest star in the constellation has an apparent brightness of 3.95mag. It is one of the magnificent triple stars discovered in 1781 by W. Herschel, all of whose blue-white components can be distinguished even with small telescopes as a tiny triangle. The two components of brightness 4.7mag and 5.2mag are located 7.3" apart. The 6.1mag guide lies at a distance of 2.8" from the first component. The system is about 700 light years away. With a larger telescope, we can still detect a 12mag star at a distance of 25.9". This entire system is referred to as 11 Mon.
|
||||
|
|
@ -3,6 +3,7 @@ name: ν Pup
|
|||
constellation: Pup
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 12:00:57.155167
|
||||
---
|
||||
an easily resolved binary only 26' NE of σ Puppis. The components of this pair have brightnesses of 4.7mag and 5.1mag and a mutual separation of 4'.
|
||||
|
|
@ -3,6 +3,7 @@ name: 12 Lyn
|
|||
constellation: Lyn
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:51:57.490919
|
||||
---
|
||||
a physical binary star made up of relatively equally bright components - 5.4mag and 6mag. They are 1.8" apart and have an orbital period of 907 years. At a distance of about 8.5" from the brighter component is another companion with a brightness of 7.5mag.
|
||||
|
|
@ -3,6 +3,7 @@ name: 38 Gem
|
|||
constellation: Gem
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:15:20.840611
|
||||
---
|
||||
The companions have a brightness of 4.7mag and 7.7mag and orbit each other once every 3,190 years or so. At the turn of the century, they were about 7.1" apart, which makes the components comfortably separated with a telescope with an 8 cm diameter lens. One is yellow, the other light blue.
|
||||
|
|
@ -3,6 +3,7 @@ name: Mekbuda (ζ Gem)
|
|||
constellation: Gem
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:14:59.981504
|
||||
---
|
||||
one of the brightest Cepheids in the sky: the main yellow star varies its brightness from 3.6mag to 4.1mag with a period of 10.15 days. Suitable comparison stars are κ (3.57mag) and υ Gem (4.07mag). One guide is located at a distance of 96" and has a brightness of 8mag, the other 11mag is observed 87" away. However, they are only optically companions. Mekbuda pulses from a distance of 1120 light years.
|
||||
|
|
@ -3,6 +3,7 @@ name: R Gem
|
|||
constellation: Gem
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:15:44.662825
|
||||
---
|
||||
a variable star of the type Mira Ceti, its brightness varies between 6-14mag over a period of 370 days. It lies close to the star δ Gem.
|
||||
|
|
@ -3,6 +3,7 @@ name: L2 Puppis
|
|||
constellation: Pup
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 12:01:44.872031
|
||||
---
|
||||
a bright long-period variable star belonging to the Myriad group, one of the brightest red variable stars, whose brightness varies between 2.6mag and 6.2mag over a period of 141 days. At its maximum, it is therefore very visible from illuminated areas, but at its minimum it falls to the limit of naked-eye visibility.
|
||||
|
|
@ -3,6 +3,7 @@ name: Wasat (δ Gem)
|
|||
constellation: Gem
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:14:36.959097
|
||||
---
|
||||
a binary star distinguishable with a small telescope. The main star has a brightness of 3.5mag and the companion 8.2mag, with an orbital period of about 1,200 years. In 1985, the companion was 6" away from the main star, so it could be observed with a telescope with a 6 cm diameter objective lens. By 2000, their mutual distance had been reduced to 5.8". Even so, this is no problem for a 200 mm telescope, in which we can see their yellow or light blue color.
|
||||
|
|
@ -3,6 +3,7 @@ name: 19 Lyn
|
|||
constellation: Lyn
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:52:43.011607
|
||||
---
|
||||
this optical binary can be easily resolved with a small telescope. The two stars, one 5.6mag and the other 6.5mag, are 14.8" apart. The first is yellow-white, the second light blue. The light from one is 680 light years away, the light from the other 690 light years away. In the larger telescope, two more optical companions are added.
|
||||
|
|
@ -3,6 +3,7 @@ name: σ Pup
|
|||
constellation: Pup
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 12:01:17.289410
|
||||
---
|
||||
a nice binary star that can be resolved with a 5 cm telescope. The main orange component has a brightness of 3.3mag and its yellow companion at a distance of 22.3" reaches only 9.4mag.
|
||||
|
|
@ -3,6 +3,7 @@ name: Kastor (α Gem)
|
|||
constellation: Gem
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:13:09.872387
|
||||
---
|
||||
Although Pollux is slightly brighter, the Greek alpha letter is Kastor (the 23rd brightest star in the sky). It has a brightness of 1.5mag and is 51 light years from Earth. In addition, it is a known multiple system. The main component has a luminosity of 1.9mag and is 22 times brighter overall than the Sun, with the guide reaching 2.9mag. They orbit each other around a common centre of gravity in 445 years. The pair's angular separation has been quite small in recent years, reaching its minimum of 1.9" in 1970. Since then, it has gradually increased again, so that these blue components can be resolved with a small telescope. In 1985 their distance was 2.6" and by 2017 it had grown to 6".
|
||||
|
|
@ -3,6 +3,7 @@ name: Pollux (β Gem)
|
|||
constellation: Gem
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:12:33.226361
|
||||
---
|
||||
with a brightness of 1.14mag is the 17th brightest star in the sky. Its luminosity is 33 times that of the Sun, and its diameter is 9 times larger. Unlike Kastoria, Pollux is orange-red and has a spectral class of K0. Its striking hue can be seen with the naked eye. It is located at a distance of 34 light years.
|
||||
|
|
@ -3,6 +3,7 @@ name: Naos (ζ Puppis)
|
|||
constellation: Pup
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 12:00:37.016074
|
||||
---
|
||||
Since the Argo originally considered itself as a single constellation, the procedure for designating stars with Greek letters is the same for all its divided parts. Therefore, we find no alpha, beta, gamma or delta Puppis in Argo, the brightest star being only ζ Puppis, which reaches a brightness of 2.3mag.
|
||||
|
|
@ -3,6 +3,7 @@ name: ζ Mon
|
|||
constellation: Mon
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 10:12:17.085476
|
||||
---
|
||||
an optical binary star. The main component has a brightness of 5mag, its companion 8.5mag. It lies at a distance of 66.4". The other companion is at 32". We need binoculars with a 7cm diameter objective lens.
|
||||
|
|
@ -3,6 +3,7 @@ name: ε Hya
|
|||
constellation: Hya
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:41:42.323586
|
||||
---
|
||||
the main component with a brightness of 3.8mag has a guide of 6.9mag at a distance of 2.8". To resolve this double star, we need a telescope with a lens diameter of at least 8 cm. The components orbit each other in 870 years and lie at a distance of 129ly.
|
||||
|
|
@ -3,6 +3,7 @@ name: 38 Lyn
|
|||
constellation: Lyn
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:51:20.365490
|
||||
---
|
||||
a double star approximately on the boundary with the neighbouring constellation of the Little Lion. The main white component reaches a brightness of 3.9mag, the rusty guide 6.6mag. They are 2.7" apart and their distance from Earth is about 117 light years. The main star has about 32 times the luminosity of the Sun. At a distance of about 88" from this star we see another guide star of stellar magnitude 11mag, but it only projects into this region by chance. It is advisable to use at least 100x magnification.
|
||||
|
|
@ -3,6 +3,7 @@ name: Alfard (α Hya)
|
|||
constellation: Hya
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:41:12.826387
|
||||
---
|
||||
the brightest star in the constellation, lies at the conjunction of the stars Kastor - Pollux of Gemini. Its remarkable orange colouring can certainly be seen with the naked eye, and it belongs to the spectral class K3. This giant reaches 2mag and is located in a relatively star-poor region. That is why its translated name from Arabic means "Solitary Star". Tycho de Brahe, however, called it Cor Hydraul - "Heart of the Hydra". It lies at a distance of 177 light years and is 780 times more luminous than the Sun.
|
||||
|
|
@ -3,6 +3,7 @@ name: τ1 Hya
|
|||
constellation: Hya
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:43:18.915658
|
||||
---
|
||||
The 4.8mag and 8mag components lie 65" apart. This is an optical binary star, for which even binoculars are sufficient to resolve.
|
||||
|
|
@ -3,6 +3,7 @@ name: R Leonis
|
|||
constellation: Leo
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:41:28.107370
|
||||
---
|
||||
a variable star of the type Mira Ceti in the western part of the constellation, near Regulus, 372 light years away. This red giant varies in brightness from 4.4mag to 11.3mag with a long period of 312.43 days. It is therefore one of the brightest long-period variable stars. At the time of maximum, we can notice its distinct, deep red hue, which contrasts nicely with the white star 19 Leonis, 8' to the south.
|
||||
|
|
@ -3,6 +3,7 @@ name: α Sex
|
|||
constellation: Sex
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 12:02:59.687941
|
||||
---
|
||||
the brightest star in the constellation has an apparent brightness of 4.5mag. It lies almost exactly on the celestial equator. It is 270 light years away.
|
||||
|
|
@ -3,6 +3,7 @@ name: Regulus (α Leonis)
|
|||
constellation: Leo
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:26:28.595677
|
||||
---
|
||||
the brightest star in the constellation. The 9-fold elongation of the front wheels of the Big Dipper will lead us to it in a southerly direction. Together with the stars Arcturus of Shepherd and Spica of Virgo, it forms a kind of spring triangle. The name comes from Latin and means "little king"; indeed, in ancient Babylon it always represented the star of the ruler. Sometimes we can also meet the name Cor Leonis - "heart of the lion". Regulus is also one of the four guardians of the sky, or even royal stars - they were the stars that marked the summer solstice point (Regulus), the spring point (Aldebaran), the winter solstice (Fomalhaut) and the autumn point (Antares) in the Persian Empire. These divided the sun's orbit - the ecliptic - and thus the year into four seasons. It is one of the few bright stars that lies near the ecliptic, exactly 1.5 degrees. That's why it's often occulted by the moon and sometimes a planet.
|
||||
|
|
@ -3,6 +3,7 @@ name: 17 a 18 Sex
|
|||
constellation: Sex
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 12:03:40.123314
|
||||
---
|
||||
a broad pair of unrelated stars that can be identified with the naked eye if the observer has good eyesight. They are easily separated by a trier. They have brightnesses of 5.9 and 5.6mag. The components are 530 and 470 light years apart.
|
||||
|
|
@ -3,6 +3,7 @@ name: ζ Leonis
|
|||
constellation: Leo
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:39:06.511874
|
||||
---
|
||||
a wide triple star, composed of stars that have no relationship to each other. ζ Leonis has a brightness of 3.4 mag. The binocular shows the star 35 Leonis to the north of it and 39 Leonis further south. Both reach 6 mag.
|
||||
|
|
@ -3,6 +3,7 @@ name: Algieba (γ Leonis)
|
|||
constellation: Leo
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:38:32.037612
|
||||
---
|
||||
"Lion's forehead", a corruption of the Arabic word Al Jabha. Actually a magnificent binary star lying 8 degrees SSE of Regulus, with yellow-orange components of 2.2mag (lum. 90 Suns) and 3.5mag (lum. 30 Suns) at a distance of 4.4", in contrast to each other they can be seen as far as green. Their mutual orbital period is estimated at 619 years. As recently as 1782, when this attractive double star was first discovered by William Herschel, the arc distance of its components was less than 2". Since then, the distance has increased significantly, reaching nearly 4.4" by the end of the 20th century.
|
||||
|
|
@ -3,6 +3,7 @@ name: β LMi
|
|||
constellation: LMi
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:43:50.982559
|
||||
---
|
||||
the only star in the constellation to be assigned a Greek letter. This tight binary, which looks like a bright 4.2mag point when viewed with the naked eye, will only show its 6.1mag companion in a large telescope and during good viewing conditions. It is located at an angular distance of only a few tenths of a second. The components have an orbital period of 37 years and a distance of 145 light years.
|
||||
|
|
@ -3,6 +3,7 @@ name: U Hya
|
|||
constellation: Hya
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 11:42:20.781557
|
||||
---
|
||||
one of the brightest and most unusual carbon stars, whose red colour can be seen even in the smallest binocular. This is due to the abundance of carbon molecules in its atmosphere that absorb blue light. U Hya is observed 4 degrees northwest of ν Hydra and is one of the irregular variable stars whose magnitude varies with some regularity from 4.7mag to 6.2mag over a period of about 450 days. It is about 680 light years away.
|
||||
|
|
@ -3,6 +3,7 @@ name: 35 Sex
|
|||
constellation: Sex
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-06 12:03:17.273799
|
||||
---
|
||||
a nice pair of orange 6.3mag and yellow-orange 7.4mag components, which are easily distinguishable even in a small amateur telescope. Their separation is 6.8".
|
||||
|
|
@ -1,8 +1,9 @@
|
|||
---
|
||||
name: Polárka (α UMi)
|
||||
name: Polaris (α UMi)
|
||||
constellation: UMi
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-08 15:21:55.345307
|
||||
---
|
||||
On the seas, in the desert and in the wilderness, it was in ancient times, before the invention of the compass, the only indicator of north. It is easily found by plotting the distance of the stars Merak and Dubhe, which form the back wheels of the Big Dipper, 4 times in the direction of the line of the line, and we reach Polaris, which is at the end of the drawbar of the Little Dipper.
|
||||
|
|
@ -3,6 +3,7 @@ name: 54 Leonis
|
|||
constellation: Leo
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:40:18.511668
|
||||
---
|
||||
a binary star lying just on the boundary with the constellation of the Little Lion. These two partners have brightnesses of 4.5mag and 6.3mag. The two stars are 6.5" apart, so they should already be distinguishable with a telescope with a lens diameter of at least 5 cm. The system is 330 light years from Earth. In 10-15 cm telescopes and 100x magnification, it is an unequally bright, colorful binary. The main component appears yellow-white, the guide is bluish to greenish.
|
||||
|
|
@ -3,6 +3,7 @@ name: ι Leonis
|
|||
constellation: Leo
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:39:36.413071
|
||||
---
|
||||
a remarkable double star. The two components with brightnesses of 4.1mag and 7.0mag orbit each other in about 180 years. In 1985, they were 1.3" apart, but they begin to drift apart, reaching 1.7" by the year 2000, making the binary resolvable in at least a 10 cm telescope.
|
||||
|
|
@ -3,6 +3,7 @@ name: τ Leonis
|
|||
constellation: Leo
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:40:53.911552
|
||||
---
|
||||
a double star, easily distinguishable with a simple trier. The main star has a brightness of 5.4mag and its companion 7.0mag. The angular separation of the two partners is 90".
|
||||
|
|
@ -3,6 +3,7 @@ name: Denebola (β Leonis)
|
|||
constellation: Leo
|
||||
created_by: 8mag
|
||||
created_date: 2022-01-21 17:00:00
|
||||
updated_by: 8mag
|
||||
updated_date: 2022-01-21 17:00:00
|
||||
updated_by: skybber
|
||||
updated_date: 2022-02-07 15:26:58.340184
|
||||
---
|
||||
has a luminosity of 2.2mag and its distance from Earth is 36 light years. It's 15 times brighter than the sun. At a distance of almost 19 arc minutes, we find a yellowish star with a brightness of 6mag, which we can already see through a theatre peephole.
|
||||
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Reference in New Issue