Английская Википедия:Gliese 42

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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 Gliese 42 is a star in the southern constellation of Sculptor. It is too faint to be seen with the naked eye, having an apparent visual magnitude of +7.3.[1] The annual parallax shift of 70.56 mas provides a distance estimate of 46 light years. It has a relatively high proper motion, advancing 0.62[2] arcseconds across the sky per annum, and is moving closer to the Sun with a radial velocity of −13 km/s.[3]

The spectrum of the star matches a stellar classification of Шаблон:Nowrap,[4] indicating it is an ordinary K-type main-sequence star that is generating energy through hydrogen fusion at its core. It is radiating 29%[5] of the Sun's luminosity from its photosphere at an effective temperature of 4,822 K.[4] The star has 66%[6] of the Sun's radius.

Debris disk

An infrared excess has been detected around this star,[7] most likely indicating the presence of a circumstellar disk at a radius of Шаблон:Convert. The temperature of this dust was initially estimated as Шаблон:Convert[6] according to measurement by Herschel Space Observatory. Later that measurement was deemed questionable,[8] and fixed temperature of Шаблон:Convert was obtained in 2020.[9]

References

Шаблон:Reflist

External links

Шаблон:Sculptor (constellation)

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  8. THE HERSCHEL COLD DEBRIS DISKS: CONFUSION WITH THE EXTRAGALACTIC BACKGROUND AT 160 μm
  9. Шаблон:Citation