Updates
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czsky
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name: BU 800-AB
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rating: None
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created_by: David1
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created_date: 2023-10-02 11:54:34.273201
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name: GRB 34-AB
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rating: None
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created_by: David1
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created_date: 2023-10-16 12:56:34.322987
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name: SKF 1311
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rating: None
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created_by: David1
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created_date: 2023-10-11 11:28:20.614673
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name: STF 1424-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-03 09:12:28.311440
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name: STF 1536-AB
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rating: None
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created_by: David1
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created_date: 2023-10-03 09:54:19.283384
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name: STF 1722
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-02 11:13:59.166575
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name: STF 1877-AB
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rating:
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rating: None
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created_by: David1
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created_date: 2023-10-05 09:08:50.575999
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name: STF 1888-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-05 09:23:53.173052
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name: STF 1930-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-11 11:06:45.620526
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name: STF 1965
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-06 09:43:43.501401
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name: STF 2032-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-06 11:00:09.064889
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---
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name: STF 2262-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-12 12:20:21.025160
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name: STF 2272-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-12 11:23:47.587179
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name: STF 2323-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-09 11:35:47.423010
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---
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name: STF 2398-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-09 12:06:12.240757
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---
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name: STF 2576-FG
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-01 17:58:24.381890
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---
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name: STF 2579-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-01 19:42:00.137806
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---
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name: STF 2580-AB
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rating:
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rating: None
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references:
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created_by: skybber
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created_date: 2023-10-01 09:58:01.625572
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---
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name: STF 262-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-25 10:31:05.732665
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---
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name: STF 3062
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-24 10:56:13.560680
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---
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name: STF 60-AB
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-24 10:52:24.243261
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---
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name: STF 79
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rating:
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rating: None
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references:
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created_by: David1
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created_date: 2023-10-16 13:14:17.807223
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---
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name: Barnard 142
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rating: 1
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references:
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created_by: langrnekor@seznam.cz
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created_date: 2023-11-08 11:51:41.546526
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updated_by: langrnekor@seznam.cz
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updated_date: 2023-11-08 11:54:02.766912
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---
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B142 vyžaduje malé zvětšení, v dalekohledu 125mm a zvětšení 27x vypadá jako zakřivený temný pás.
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Nachází se kousek od B143.
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name: Barnard 143
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rating: 1
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references:
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created_by: langrnekor@seznam.cz
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created_date: 2023-11-08 11:53:31.075886
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updated_by: langrnekor@seznam.cz
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updated_date: 2023-11-08 11:53:31.078528
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---
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B 143 při malém zvětšení 27x a dalekohledu o průměru 125mm připomíná srpek, nebo Céčko.
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Nachází se hned vedle B 142.
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references:
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created_by: langrnekor@seznam.cz
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created_date: 2021-07-04 11:52:35.886908
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updated_by: skybber
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updated_date: 2021-07-05 10:56:56.991497
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updated_by: langrnekor@seznam.cz
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updated_date: 2023-11-08 17:44:07.808503
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---
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Barnardova temná mlhovina B352 se nachází uvnitř mlhoviny NGC7000 zvané též "Severní Amerika".
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Barnardova temná mlhovina B352 se nachází uvnitř mlhoviny NGC7000 zvané též "Severní Amerika".
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Její tvar je poměrně složitý, dá se v ní ledacos vypozorovat, chce to delší pozorovací čas. Takto nějak vypadá v dalekohledu 125mm se zvětšením 27x.
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---
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name: Barnard 361
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rating: 1
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references:
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created_by: langrnekor@seznam.cz
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created_date: 2023-11-07 19:39:46.870106
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updated_by: langrnekor@seznam.cz
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updated_date: 2023-11-07 19:55:20.793760
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---
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Barnard 361 je jedna z těch lehčích temných mlhovin.
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V refraktoru 125mm při zvětšení 27x je vidět poměrně jasný tmavý koláč.
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name: Barnard 362
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rating: 1
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references:
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created_by: langrnekor@seznam.cz
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created_date: 2023-11-08 10:56:53.733061
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updated_by: langrnekor@seznam.cz
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updated_date: 2023-11-08 10:56:53.735806
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---
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Dalekohled 125mm, zvětšení 27x, lze vytušit protáhlý těžce ohraničený tvar.
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---
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name: Burnham 800
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constellation: Com
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created_by: editor.cs
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created_date: 2023-11-07 09:40:06.068206
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updated_by: editor.cs
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updated_date: 2023-11-07 09:40:06.068210
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---
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A beautiful binary star, despite the unequal brightness of the orange component at 6.6 magnitude and the red component at 9.7 magnitude with a separation of 6.8". A star with a magnitude of 10.4 is located 92.5" north of the primary star. We need a high-quality telescope of at least 10 cm.
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---
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name: Dunlop 236
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constellation: Mic
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created_by: editor.cs
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created_date: 2023-11-07 09:39:48.401130
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updated_by: editor.cs
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updated_date: 2023-11-07 09:39:48.401133
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---
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beautiful wide pair (57.4") of two nearly equally bright stars (6.5mag and 6.9mag) suitable for binoculars and small telescopes.
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---
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name: Hindova karmínová hviezda (R Lep)
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constellation: Lep
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created_by: editor.cs
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created_date: 2023-11-07 09:40:16.559463
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updated_by: editor.cs
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updated_date: 2023-11-07 09:40:16.559468
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---
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similarly to Mira Ceti, it is a red giant that changes its brightness usually in the range of 6mag to 11.7mag in a period of 430 days. The total difference between the maximum and minimum corresponds to a brightness difference of 300x. It also has a long secondary cycle - every 40 years the star brightens up to 5.5mag. At the time of maximum brightness, it resembles a vivid red drop of blood in the dark sky and is visible to the naked eye. It is located near μ Lep (3.31mag). R Leporis is a giant star with a low surface temperature of about 2,700 K, with carbon molecules in its atmosphere that absorb short-wavelength radiation and an extensive dust cloud that surrounds it. All of this is the cause of the star's red color, which stands out especially during the period of its maximum brightness. The star is visible with a hand-held telescope, but a telescope is needed for clear color distinction.
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---
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name: Musca Borealis (Severná mucha)
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constellation: Ari
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created_by: editor.cs
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created_date: 2023-11-07 09:42:19.604547
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updated_by: editor.cs
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updated_date: 2023-11-07 09:42:19.604553
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---
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The now non-existent constellations, which once consisted of three stars of the constellation Aries - 35, 39, 41 Arietis, representing buzzing sea flies settling on the ram's tail.
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---
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name: N Hya
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constellation: Hya
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created_by: editor.cs
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created_date: 2023-11-07 09:41:58.275113
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updated_by: editor.cs
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updated_date: 2023-11-07 09:41:58.275119
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---
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nice pair of nearly equally bright yellow components, 5.8 magnitude, 5.9 magnitude, easily distinguishable in small telescopes, components are separated by 9.2". In the same field of view, we can also see one reddish-orange star, 8' northeast.
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---
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name: Proxima Centauri
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constellation: Cen
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created_by: editor.cs
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created_date: 2023-11-07 09:16:18.863875
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updated_by: editor.cs
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updated_date: 2023-11-07 09:16:18.863880
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---
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In 1915, R. T. Innes measured the proper motions of stars around α Centauri. At a distance of 2.2 arc degrees southwest of this star, he found a star with a brightness of 10.7 mag, which was moving in the same direction and at the same speed as both components of α Centauri. This red dwarf is actually our closest star to the Sun, only 4.25 light-years away. It is likely part of the α Centauri system, although it orbits at a very large distance. In a few thousand years, when it passes Toliman, it will no longer be our closest star. Proxima, which means "closest" in Latin, occasionally brightens by more than half a magnitude and usually returns to its original brightness within half an hour. Proxima Centauri is a small star, with a mass only 1/10 of the Sun's mass, and it is very faint, shining less than 0.0008 times the brightness of the Sun.
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---
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name: S Vol
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constellation: Vol
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created_by: editor.cs
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created_date: 2023-11-07 09:41:13.862042
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updated_by: editor.cs
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updated_date: 2023-11-07 09:41:13.862046
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---
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A variable star of the Mira type, whose maximum is usually around 8.6 mag, sometimes even 7.7 mag. However, it only drops to 13.6 mag at minimum. This entire cycle takes place over a period of 14 months.
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---
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name: S a U Oct
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constellation: Oct
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created_by: editor.cs
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created_date: 2023-11-07 09:27:49.534761
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updated_by: editor.cs
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updated_date: 2023-11-07 09:27:49.534765
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---
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Other variable stars of the Mira Ceti type, which can reach a maximum magnitude of 8, but only drop to a minimum of 14mag. Their periods are 259 and 303 days.
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---
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name: Struve 2470/2474
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constellation: Lyr
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created_by: editor.cs
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created_date: 2023-11-07 09:15:48.588025
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updated_by: editor.cs
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updated_date: 2023-11-07 09:15:48.588029
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---
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Another double double star in the constellation, observed northeast of γ Lyrae. The two main stars are separated by just over 10 arcminutes. In at least a 10 cm telescope, Struve 2470 splits into two stars, which are separated by 13.4 arcseconds: a white and a light blue star, with magnitudes of 6.6 and 8.6, respectively. The faint yellow components of Struve 2474 are separated by 16.2 arcseconds and have magnitudes of 6.7 and 8.8.
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---
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name: Algenib (α Per)
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constellation: Per
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created_by: editor.cs
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created_date: 2023-11-07 09:14:28.516828
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updated_by: editor.cs
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updated_date: 2023-11-07 09:14:28.516833
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---
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Other names for it are Mirfak or Marfak. This yellow-white supergiant with an apparent magnitude of 1.8 is the brightest star in the constellation. With an absolute luminosity 5800 times greater than that of the Sun, it is located 390 light-years away.
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---
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name: 32 Eri
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constellation: Eri
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created_by: editor.cs
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created_date: 2023-11-07 09:40:46.169989
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updated_by: editor.cs
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updated_date: 2023-11-07 09:40:46.169994
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---
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Contrasting double star observable even with a small telescope. Its companions with magnitudes 4.8 and 6.1 are separated by 6.8". The primary component is dark yellow, while the companion is green-white.
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---
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name: Rigel (β Ori)
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constellation: Ori
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created_by: editor.cs
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created_date: 2023-11-07 09:41:50.106993
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updated_by: editor.cs
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updated_date: 2023-11-07 09:41:50.106998
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---
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It is usually the brightest star in the constellation, only occasionally surpassed by Betelgeuse during its greatest maximum. With its brightness of 0.14mag, it is the seventh brightest star in the sky. It is of spectral type B8, so its blue-white color is clearly visible to the naked eye. Rigel is 78 times larger and 12,000 times more luminous than our Sun, and it is located at a distance of 860 light-years.
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---
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name: Nihal (β Lep)
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constellation: Lep
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created_by: editor.cs
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created_date: 2023-11-07 09:39:20.561755
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updated_by: editor.cs
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updated_date: 2023-11-07 09:39:20.561760
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---
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triple star. At a star with a brightness of 2.8mag, there are two components at a separation of 2.5" and 64", both with a brightness of 11mag. The farther component is just an optical companion. The main star is located 160 light years away.
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---
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name: Deneb Kaitos (β Cet)
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constellation: Cet
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created_by: editor.cs
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created_date: 2023-11-07 09:41:40.859817
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updated_by: editor.cs
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updated_date: 2023-11-07 09:41:40.859821
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---
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With a brightness of 2.04 mag, it is the brightest star in the constellation. However, when the long-period variable star Mira Ceti is at its maximum, it becomes the brightest in the constellation. The line connecting the stars Alpheratz and Gamma Pegasi from the Square of Pegasus points to Deneb Kaitos. It is occasionally confused with the star Fomalhaut, but it is one magnitude fainter than it. It is located 96 light-years away.
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@ -0,0 +1,9 @@
|
|||
---
|
||||
name: 26 Aur
|
||||
constellation: Aur
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:39:11.348086
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:39:11.348091
|
||||
---
|
||||
triple star, the AB pair (6mag) is too close together to be resolved (0.2") by amateur telescopes, but the third component (8mag) creates a nice contrast with it, consisting of unequally bright yellow and blue stars at a separation of 12.4".
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Achird (η Cassiopeiae)
|
||||
constellation: Cas
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:39:35.706374
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:39:35.706378
|
||||
---
|
||||
well-known binary star, discovered in 1779 by William Herschel. The yellow, golden star (3.7mag) has a separation of 13" (with the separation changing from 5" to 16" over the period) and is accompanied by a companion of brightness 7.4mag with a red, purplish tint, which orbits it every 526 years. The binary star can be resolved in a 6 cm telescope.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: ε Mon
|
||||
constellation: Mon
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:17:07.448860
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:17:07.448864
|
||||
---
|
||||
At the main star with a brightness of 4.5mag, there is a companion at a separation of 13.4" with a brightness of 6.5mag, which can be observed even with a smaller telescope. Both components have a yellow color. At a distance of 93.7" from them, a faint blue companion with a brightness of 12.7mag can be revealed with a larger telescope.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Canopus (α Car)
|
||||
constellation: Car
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:15:58.863800
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:15:58.863803
|
||||
---
|
||||
The main star of the constellation, but once also the entire Argo Navis, is α Argus, which represented the helm. As it is located on the very northwestern edge of the constellation, as an orange star it could be seen from as far as northern Africa low above the southern horizon. During the local winter, it culminates about 20 minutes before Sirius in Canis Major. Canopus is a yellow supergiant of spectral class FO, with its brightness of -0.8mag, it is the second brightest star in the sky after Sirius. It is 313 light-years away from the Sun and is 200,000 times more luminous than it. Interestingly, it is located far from the ecliptic, which is why most interplanetary satellites use it for spatial orientation.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Procyon (α Cmi)
|
||||
constellation: CMi
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:42:26.681739
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:42:26.681743
|
||||
---
|
||||
In Greek, it means "before the dog" because when viewed from most places in the northern hemisphere, it rises slightly earlier than Sirius - the Dog Star. It is the eighth brightest star in the sky (0.5 mag) and one of the closest, located 11.4 light-years away from us. Among the bright stars, it is only closer to Alpha Centauri and Sirius. Procyon is easy to find, forming an equilateral triangle with the stars Sirius and Betelgeuse, which spans across the celestial equator and is visible from all latitudes. It is called the Winter Triangle, and its curiosity is that it is best seen above the horizon during the peak of the local summer in the southern hemisphere. Over the course of 1000 years, Procyon will move across the stellar background by the diameter of the Moon, which is 1.25" per year.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Tegmin (ζ Cancri)
|
||||
constellation: Cnc
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:28:30.788222
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:28:30.788226
|
||||
---
|
||||
The triple star, with its two most prominent components at magnitudes 5.6 and 6.2, are separated by 5.7", which can be observed with a 5 cm telescope. Their mutual orbital period is approximately 1,100 years. The brighter star itself is a close binary - its companion with a magnitude of about 6 can be resolved at a separation of 0.8". It can be well distinguished with a telescope with a 300 mm objective diameter. Its orbital period is 59.6 years, and in 1991, its separation was only 0.5".
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: 35 Sex
|
||||
constellation: Sex
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:42:43.924835
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:42:43.924839
|
||||
---
|
||||
nice pair of orange 6.3 magnitude and yellow-orange components of 7.4 magnitude, which can be easily distinguished even in a small amateur telescope. Their separation is 6.8".
|
||||
|
|
@ -1,9 +1,9 @@
|
|||
---
|
||||
name: Polaris (α UMi)
|
||||
name: Polárka (α UMi)
|
||||
constellation: UMi
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-05 17:30:01.832562
|
||||
updated_by: skybber
|
||||
updated_date: 2023-11-05 18:18:56.667329
|
||||
created_date: 2023-11-07 09:41:22.448116
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:41:22.448119
|
||||
---
|
||||
Once known as the "leading star in the sky," it has another name - the North Star. In seas, deserts, and wastelands, it was the only indicator of the north in ancient times, before the invention of the compass. We can easily find it by drawing a line connecting the stars Merak and Dubhe, which form the back wheels of the Big Dipper, and extending it four times in the direction of the line. This will lead us to Polaris, which is located at the end of the handle of the Little Dipper.
|
||||
once known as the "leading star in the sky" has another name - the North Star. In seas, deserts, and wastelands, it was the only indicator of the north in ancient times, before the invention of the compass. We can easily find it by drawing a line connecting the stars Merak and Dubhe, which form the back wheels of the Big Dipper, and extending it four times in the direction of the line. This will lead us to Polaris, which is located at the end of the handle of the Little Dipper.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: 2 Com
|
||||
constellation: Com
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:27:58.946616
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:27:58.946620
|
||||
---
|
||||
nice pair of two yellow components (5.9mag and 7.4mag). This binary star can be resolved with a telescope with an objective diameter larger than 10 cm at a separation of 3.7".
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Mizar a Alcor (ζ a 80 UMa)
|
||||
constellation: UMa
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:27:53.053940
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:27:53.053945
|
||||
---
|
||||
The most famous binary star, which Arabs used to call "guide" or "sharpness tester of vision". The mutual distance between the two stars is 12', so a healthy eye can easily distinguish them practically always. They form a nice pair even in a telescope.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Hadar (β Centauri)
|
||||
constellation: Cen
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:27:29.882629
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:27:29.882633
|
||||
---
|
||||
or also known as Agena. With its magnitude of 0.9, it is the 10th brightest star in the sky. Together with the star Toliman, which is only four and a half degrees away, it forms a good reference point for identifying the Southern Cross and prevents its confusion with the so-called False Cross, which is formed by the stars of the Keel and the Sail. Although this blue-white supergiant is fainter in the sky compared to Toliman, it is located about 100 times further away. Its absolute magnitude reaches -5.5. If it were located in the place of Toliman, it would have an apparent magnitude of about -10!
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Thuban (α Dra)
|
||||
constellation: Dra
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:28:12.452150
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:28:12.452153
|
||||
---
|
||||
Once the brightest star in the constellation, it now has a magnitude of only 3.6. 4,800 years ago, during the time of ancient Egypt, it marked the northern celestial pole and was only 10 arc minutes away from it. However, due to the precession of the Earth's axis, the pole has since shifted towards Polaris, and Thuban is now over 25 degrees away from it. Thuban belongs to the spectral class AO and is located between Mizara and Kochab. It is 215 light-years away and is 135 times brighter than the Sun.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Mettalah (α Trianguli)
|
||||
constellation: Tri
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:43:20.906200
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:43:20.906204
|
||||
---
|
||||
Latin "Caput Trianguli" - the apex of the triangle. Its brightness is 3.6 magnitude and it is located 63 light years away. It has two faint companions with magnitudes of 12 and 12.9 at angular distances of 222 "and 83".
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Toliman (α Centauri)
|
||||
constellation: Cen
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:42:03.665435
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:42:03.665441
|
||||
---
|
||||
It is the brightest star in the constellation and the third brightest star in the sky after Sirius and Canopus. However, it is located quite far south and can only be seen just above the horizon during culmination from 25 degrees north latitude. At a distance of 4.36 light-years, it is our closest star visible to the naked eye. In reality, it consists of two yellow components with magnitudes of 0.1 and 1.3, which can usually be easily distinguished even with a small telescope - at the turn of the millennium, their separation reached 14.1". In 2035, this distance will only decrease to 2 arc seconds. Their mutual orbital period around the common center of mass is 80 years. The α Centauri system is actually our closest stellar system. However, our closest star is actually a red dwarf with a magnitude of 10.7 called Proxima Centauri, which is also physically related to this system.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: ξ Boo
|
||||
constellation: Boo
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:28:50.033300
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:28:50.033304
|
||||
---
|
||||
A close binary star, with components of 4.8 magnitude (yellow) and 6.9 magnitude (red-orange), which have a mutual orbital period of 149 years. Since 1980, when they reached their maximum separation (7.2"), their separation has gradually decreased and currently reaches approximately 6". At the closest separation of 1.8" (last observed in 1918), the companion star is lost in small telescopes. The system is located 22 light-years away. In the field of view, at a distance of 99", another star HR 5553 (magnitude 6) usually appears, but it is not related to this system in any way.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: 5 Ser
|
||||
constellation: Ser
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:15:37.670634
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:15:37.670638
|
||||
---
|
||||
unequal pair of yellow 5.1 magnitude and red 10.1 magnitude components separated by 11.2". In the field of view, at a separation of 127", there is a companion of magnitude 9.1 and on the edge, a globular star cluster M5.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Gemma (α CrB)
|
||||
constellation: CrB
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:14:55.976592
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:14:55.976596
|
||||
---
|
||||
Latin "drahokam". Occasionally, the Arabic name Alphecca (bowl) is used. The blue-white star with a magnitude of 2.3 is located 75 light-years away and is 45 times more luminous than the Sun. It cannot be observed with the naked eye, but it is an eclipsing variable star. Its brightness changes by 0.1 magnitude over a period of 17.36 days. It moves in the same direction as a group of stars mainly from the Big Dipper, known as the "bear stream". This group also includes Sirius, for example.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: ζ CrB
|
||||
constellation: CrB
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:16:12.202777
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:16:12.202781
|
||||
---
|
||||
A nice double star, even for a small telescope with an objective diameter of at least 6 cm. It consists of components with brightness of 5.1 mag and 6 mag, separated by 6.3 arcseconds. One component has a bluish tint, the other has a greenish tint. It is located at a distance of 470 light years.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: ξ Sco
|
||||
constellation: Sco
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:15:17.902905
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:15:17.902909
|
||||
---
|
||||
nice double star, with components of brightness 4.8mag and 7.3mag (bluish) at a separation of 7.6". The primary star is also a double star, currently not observable with a small telescope. The second component is almost equally bright (5.1mag) and is located at a separation of only 0.5". It has a yellow color. In the same field of view, there is also Struve 1999, a dark yellow pair of components with magnitudes 7.4mag and 8.1mag, at a separation of 11.6".
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: ε Tri
|
||||
constellation: Tri
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:39:53.957761
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:39:53.957764
|
||||
---
|
||||
unequal double star with a brighter pale blue component (5.4 magnitude) and a much fainter white companion (11.4 magnitude). They can be easily resolved (3.9 arcseconds) with a 200mm telescope.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Alrakis (μ Dra)
|
||||
constellation: Dra
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:16:53.979766
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:16:53.979771
|
||||
---
|
||||
A well-known binary star, whose both white components have a brightness of about 5.65 mag, but appear as a single point of 5th magnitude to the naked eye. The mutual orbital period of both companions is over 812 years. By the end of the 20th century, the two stars were separated by about 1.9", requiring higher magnification to be resolved. Therefore, it is a suitable test for a good 100 mm telescope. The system is located 89 light-years away from Earth.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: δ Her
|
||||
constellation: Her
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:40:50.816728
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:40:50.816732
|
||||
---
|
||||
A well-known optical double star, whose pale blue components exhibit completely different proper motions, resulting in a relatively significant change in their mutual position over time. In 1830, their mutual separation was 26", but by 1960 they had approached each other to a distance of only 9", and since then their separation has gradually increased again. The primary star has a magnitude of 3.1 and the companion has a magnitude of 8.2. To resolve this rare pair, a telescope with a 6 cm objective diameter will suffice.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Kuma (ν Dra)
|
||||
constellation: Dra
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:17:02.543540
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:17:02.543545
|
||||
---
|
||||
A wide double star composed of two nearly equally bright white stars (4.9 mag), which are located at a mutual separation of 61.9". Even when observing this pair in a telescope, a splendid view is offered. Both components are located 99 light-years away from us.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: R Scuti
|
||||
constellation: Sct
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:14:38.536381
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:14:38.536384
|
||||
---
|
||||
A dark yellow supergiant, a semi-regular variable star of RV Tauri type, one degree south of β Scuti (4.2 mm). Its brightness varies from 4.9 mag to 8.2 mag in a period of five months - the main period being 140 days. The deep minimum may be caused by carbon particles forming in the star's atmosphere. It is within the reach of a telescope, as it is the brightest RV Tauri variable star: it seems to oscillate at least in two overlapping periods and at its maximum it is at least 8,000 times more luminous than the Sun. It often changes brightness between 5-6 mag, but after four or five such cycles it drops to 8th magnitude. It is about 2,500 light years away. Similar stars have been found not only in parts of the Milky Way, but also in globular clusters, even in the center of the Galaxy itself.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: γ CrA
|
||||
constellation: CrA
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:42:50.257059
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:42:50.257064
|
||||
---
|
||||
tight binary star, whose equally bright 5th magnitude components orbit each other every 120 years. We can distinguish them with a larger telescope. It is located at a distance of 58 light years.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: σ Octantis
|
||||
constellation: Oct
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:28:04.498428
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:28:04.498432
|
||||
---
|
||||
The Southern Pole Star, or rather a star with a brightness of 5.4 magnitude, is visible only exceptionally with the naked eye on clear nights. It is so faint that it hardly helps us at all in finding the southern celestial pole. To determine it, the longer arm of the Southern Cross is used, which points to it, or the pair of Magellanic Clouds, which form an approximately equilateral triangle with it. Sigma Octantis is located 270 light-years away from Earth.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Dabih Major (β Cap)
|
||||
constellation: Cap
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:16:36.306334
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:16:36.306339
|
||||
---
|
||||
It is a yellow spectral binary star with a brightness of 3.3mag and an invisible companion that orbits it every 1374 days, located 650 light-years away. At a separation of 205", there is a blue companion Dabih Minor - β1, with a brightness of 6mag. It is located at a distance of 328 light-years. The whole system is completed by a third yellow star with a magnitude of 9mag, and in larger telescopes, a faint pair of stars with a magnitude of 13mag.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: ρ Cap
|
||||
constellation: Cap
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:39:29.249870
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:39:29.249874
|
||||
---
|
||||
A quite nice double star, even visible in binoculars and small telescopes. The stars (5mag, 6.7mag) are separated by 247.6", and therefore in a 15 cm telescope they appear as a wide colorful pair of yellow and purple stars.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: γ/6 Equ
|
||||
constellation: Equ
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:42:55.424464
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:42:55.424469
|
||||
---
|
||||
Only an optical double star, distinguishable with the naked eye under favorable conditions. The stars (4.6 magnitude, 6 magnitude) are separated by nearly 6 arc minutes. However, Gamma EQU also has a physical companion of 11th magnitude, which is separated by 2". A telescope with a minimum aperture of 150 mm is required to observe it. They are located 118 light years away.
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: 57 Peg
|
||||
constellation: Peg
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:41:06.768945
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:41:06.768950
|
||||
---
|
||||
A beautiful pair consisting of a primary orange component (5.1 mag) and a blue companion (9.7 mag), located 32.6" away from the primary component.
|
||||
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|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: φ1 Peg
|
||||
constellation: Peg
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:15:28.072634
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:15:28.072638
|
||||
---
|
||||
A beautiful, dark yellow star with four companions of brightness 10.1 mag, 10.6 mag, 11.9 mag, and 12.5 mag. Additionally, it forms a nice pair in binoculars with the yellow star φ2 Peg (4.3 m).
|
||||
|
|
@ -0,0 +1,9 @@
|
|||
---
|
||||
name: Algol (β Per)
|
||||
constellation: Per
|
||||
created_by: editor.cs
|
||||
created_date: 2023-11-07 09:43:02.744250
|
||||
updated_by: editor.cs
|
||||
updated_date: 2023-11-07 09:43:02.744254
|
||||
---
|
||||
It is the most famous eclipsing variable star - it is the main representative of eclipsing variable stars with a subgroup of Algol type. Sometimes it is referred to as the "winking demon", which is related to its representation as the eye of Medusa. It was also depicted this way in ancient Greece, but there are no records proving that anyone noticed its light changes at that time. It was first observed by Italian astronomer Geminiani Montanari from Bologna in 1667, making it the only known variable star in the Middle Ages. Its true nature was correctly recognized by English astronomer John Goodrick in 1782.
|
||||
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Reference in New Issue