9 lines
622 B
Markdown
9 lines
622 B
Markdown
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name: Gemma (α CrB)
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constellation: CrB
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created_by: editor.cs
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created_date: 2022-01-21 17:00:00
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updated_by: skybber
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updated_date: 2022-01-25 15:49:07.885144
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---
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Latin for "jewel". The Arabic name Alphecca (bowl) is more rarely used. The blue-white star, with a brightness of 2.3mag, is 75 ly away, and is 45 times brighter than the Sun. It's not visible to the naked eye, but it is an occulting variable star. It changes brightness by 0.1mag over 17.36 days. In space, it moves in the same direction as a group of stars mostly from the Big Dipper, known as the "Bear Stream". This group includes, for example, Sirius. |