Английская Википедия:12 Persei
Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox image Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox orbit Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end 12 Persei (12 Per) is a double-lined spectroscopic binary star system in the northern constellation Perseus. Its combined apparent magnitude is 4.94,[1] which means it can be viewed with the naked eye. Based upon parallax measurements, this system is about 79 light years away from the Sun.[2]
The magnitude difference between the two components is estimated to be 0.51. Based upon this, the primary has a mass around 138% of the Sun, 155% of the Sun's radius, and shines with three times the Sun's luminosity. The smaller secondary component is also larger than the Sun, with 124% of the Sun's mass, 131% of the radius of the Sun, and has 186% of the Sun's luminosity.[3] The stellar classification of the primary is F9 V,[4] which suggests it is an F-type main sequence star. The pair have an estimated age of just over a billion years.[3]
The pair orbit each other with a period of 331 days and an eccentricity of 0.663.[3] The semimajor axis of their orbit is 1.27 AU, which means the inner stability radius for a hypothetical planet orbiting the pair would be at 4.35 AU. This lies outside the habitability zone for this system.[5]
References
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- Английская Википедия
- Perseus (constellation)
- F-type main-sequence stars
- Solar-type stars
- Flamsteed objects
- Spectroscopic binaries
- Hipparcos objects
- Gliese and GJ objects
- Bright Star Catalogue objects
- Henry Draper Catalogue objects
- Durchmusterung objects
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