Английская Википедия:HD 88836

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Шаблон:Short description Шаблон:Starbox begin Шаблон:Starbox observe Шаблон:Starbox character Шаблон:Starbox astrometry Шаблон:Starbox detail Шаблон:Starbox catalog Шаблон:Starbox reference Шаблон:Starbox end

HD 88836, also known as HR 4019, is a solitary, yellow-hued star located in the southern constellation Antlia. It has an apparent magnitude of 6.32,[1] placing it near the limit for naked eye visibility. Based on an annual parallax shift of Шаблон:Val, the object is estimated to be 465 light years away from the Solar System.[2] Its distance from the Sun does not appear to be changing, having a radial velocity of Шаблон:Val.[3]

HD 88836 has a stellar classification of G8 III,[4] indicating that it is an evolved red giant. Gaia Data Release 3 stellar evolution models place it on the red giant branch.[2] At present it has 2.3 times the mass of the Sun but has expanded to 10 times its girth.[5] It shines with a luminosity of Шаблон:Solar luminosity from its enlarged photosphere at an effective temperature of Шаблон:Val.[5] HD 88836 metallicity – what astronomers dub as a star's abundance of elements heavier than helium – is around solar level.[5] Like most giants, the object spins slowly, having a projected rotational velocity of Шаблон:Val.[6]

There is a 13th magnitude companion located Шаблон:Val away along a position angle of Шаблон:Val,[7] which was first noticed by R.A. Rossiter in 1912. It is unknown if its physically related to HD 88836 or not, although its Gaia Data Release 3 parallax is much smaller than HD 88836's.[8]

References

Шаблон:Reflist

External links

Шаблон:Stars of Antlia

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