Английская Википедия:HR 7955

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HR 7955 is a binary star[1] system in the northern circumpolar constellation of Cepheus, near the constellation border with Cygnus. It has a yellow-white hue and is faintly visible to the naked eye with a combined apparent visual magnitude of 4.51.[1] The system is located at a distance of 89 light-years (27.3 parsecs) from the Sun, based on parallax.[2] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.243 arc seconds per annum,[3] and is drifting closer to the Sun with a radial velocity of -33 km/s.[4]

The double-lined nature of this spectroscopic binary system was not announced until 1972.[5] It has an orbital period of Шаблон:Convert and an eccentricity of 0.551.[1] Both components appear to be slightly evolved stars that are leaving the main sequence and becoming subgiant stars, with stellar classifications of F8IV-V and F9IV-V. They each have slightly greater mass than the Sun: 107% and 105%, respectively.[1] The system is about 2.25 billion years old.[6]

References

Шаблон:Reflist

Шаблон:Stars of Cepheus

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