Английская Википедия:49 Cassiopeiae
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe 2s Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end
49 Cassiopeiae is a binary star[1] system in the northern circumpolar constellation of Cassiopeia. It is visible to the naked eye as a faint, yellow-hued point of light with an apparent visual magnitude of 5.22.[2] The system is located about 412 light years away from the Sun, based on parallax. The pair had an angular separation of Шаблон:Val along a position angle of 244°, as of 2008, with the brighter component being of magnitude 5.32 and its faint companion having magnitude 12.30.[3]
The primary, designated component A,[3] is an aging giant star with a stellar classification of G8III.[4] It is 302 million years old with 3.3 times the mass of the Sun.[5] With the supply of hydrogen at its core exhausted, the star has now expanded to 17 times the Sun's radius. It is a red clump giant on the horizontal branch, which indicates it is generating energy through the fusion of helium at its core.[6] The star is radiating 140 times the luminosity of the Sun from its swollen photosphere at an effective temperature of Шаблон:Val. Its faint secondary companion, component B, is of an unknown spectral type. It has a temperature similar to the primary, but a luminosity much lower than the Sun's.
References
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; для сносокEggleton2008
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; для сносокAnderson2012
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; для сносокWDSC2014
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; для сносокAbt2008
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; для сносокTakeda2008
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; для сносокAlves2000
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- Английская Википедия
- G-type giants
- Horizontal-branch stars
- Double stars
- Cassiopeia (constellation)
- Durchmusterung objects
- Flamsteed objects
- Henry Draper Catalogue objects
- Hipparcos objects
- Bright Star Catalogue objects
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