Английская Википедия:HD 142022

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HD 142022 is a binary star[1] system located in the southernmost constellation of Octans. It is too faint to be visible to the naked eye, having an apparent visual magnitude of 7.70.[2] The distance to this system is Шаблон:Convert based on parallax, but it is drifting closer to the Sun with a radial velocity of −10 km/s.[3]

The primary, designated component A, is an old,[1] Population I G-type star with a stellar classification of G9IV-V,[4] showing a spectrum with mixed traits of a main sequence and a subgiant star. It is an estimated 7.6 billion years old and is spinning with a projected rotational velocity of 2 km/s. The star has similar mass and dimensions as the Sun, but has a 55% higher metallicity.[5] It is radiating 89%[6] of the luminosity of the Sun from its photosphere at an effective temperature of 5516 K.[5]

The magnitude 11.19[7] companion has the designation LTT 6384 and appears gravitationally bound to the primary. The pair have an angular separation of Шаблон:Val, which corresponds to a projected separation of Шаблон:Val. The estimated semimajor axis of their orbit is Шаблон:Val.[1] The secondary is a red dwarf star with a stellar classification of M1V.[7]

The primary star has a single known planetary companion, HD 142022 Ab, discovered in 2005.[1] In 2023, the inclination and true mass of HD 142022 Ab were determined via astrometry.[8]

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See also

References

Шаблон:Reflist

Шаблон:Sky Шаблон:Stars of Octans

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