Английская Википедия:HD 133981

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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 133981, also known as HR 5628, is a solitary, bluish-white hued star located in the southern circumpolar constellation of Apus. It has an apparent magnitude of 6.02,[1] allowing it to be faintly visible to the naked eye in ideal conditions. The object is located relatively far at a distance of 856 light years based on parallax measurements from Gaia DR3[2] but is approaching the Solar System with a heliocentric radial velocity of Шаблон:Val.[3]

HD 133981 has a stellar classification of B8 IV,[4] indicating that it is a B-type star that is evolving towards the red giant branch. Houk and Cowley (1975) gave a slightly more evolved class of B8/9 III,[5] instead indicating that it is a giant star. Some evolutionary models show that it is a star just reaching the end of the main sequence.[2] Nevertheless, it has 3.72 times the mass of the Sun[2] and 6.35 times its girth.[6] It radiates 364 times the luminosity of the Sun[2] from its photosphere at an effective temperature of Шаблон:Val.[7] HD 133981 is said to be 202 million years old.[2]

HD 133981 lies in front of the distant faint galaxy LEDA 54288.[8] A debris disk has been detected around the star. It has 22.5 times the mass of the Earth and an equilibrium temperature of Шаблон:Val.[7]

Шаблон:Orbitbox planet begin Шаблон:OrbitboxPlanet disk Шаблон:Orbitbox end

References

Шаблон:Reflist

Шаблон:Stars of Apus

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