Английская Википедия:1 Serpentis

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1 Serpentis (1 Ser) is a red giant in the constellation Virgo with an apparent magnitude of 5.5. It is a red clump giant, a cool horizontal branch star that is fusing helium in its core.[1] It has expanded to over 13 times the radius of the Sun and although it is cooler at Шаблон:Val it is 77 times more luminous. It is 322 light years away.

The Flamsteed designation 1 Serpentis was given to the star when the constellation Serpens was combined with the constellation Ophiuchus.[2] It was also given the Bayer designation M Serpentis. When Ophiuchus and Serpens were separated into distinct constellations, 1 Serpentis was left over the border in Libra. Since then it has moved slightly and is now in Virgo.[3]

A 10th-magnitude companion star discovered by William Herschel is Шаблон:Val away.[4] It is at the same distance as 1 Ser and shares a common proper motion,[5] It is considered likely to be a physical companion,[6] with the two stars separated by Шаблон:Val.[7] It has a spectral type of G5 IV,[7] and it is slightly smaller and less luminous than the sun.[5]

A much more widely-separated 10th-magnitude star is also listed in multiple star catalogues,[4] but it is an unrelated background object.[8]

References

Шаблон:Reflist

Шаблон:Stars of Virgo

Шаблон:Authority control

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