# 6 Lyncis

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**6 Lyncis** is a [star](/source/Star) in the northern [constellation](/source/Constellation) of [Lynx](/source/Lynx_(constellation)),[1] located approximately 179 [light years](/source/Light_year) from Earth.[2] It is visible to the naked eye as a dim, orange-hued star with an [apparent visual magnitude](/source/Apparent_visual_magnitude) of 5.86.[3] This object is moving away from the Earth with a heliocentric [radial velocity](/source/Radial_velocity) of +40 km/s.[3] It has a relatively high [proper motion](/source/Proper_motion), traversing the [celestial sphere](/source/Celestial_sphere) at the rate of 0.341 [arc seconds](/source/Arc_second) per annum.[4] One exoplanet is known to orbit it.[5]

This is an aging [giant star](/source/Giant_star) with a [stellar classification](/source/Stellar_classification) of K0.5 IIIb Fe0.5,[6] which indicates it has a mild overabundance of iron in its [spectrum](/source/Stellar_spectrum). At 2.8 billion years old,[7] it has exhausted the hydrogen at its core, causing it to [evolve](/source/Stellar_evolution) away from the [main sequence](/source/Main_sequence). As a consequence, it has expanded to 5.12 times the [radius of the Sun](/source/Radius_of_the_Sun)[8] although it only has 1.37 times the [Sun's mass](/source/Sun's_mass).[9] The star is radiating 14.2 times the [luminosity of the Sun](/source/Luminosity_of_the_Sun) from its swollen [photosphere](/source/Photosphere) at an [effective temperature](/source/Effective_temperature) of 4,950 K.[7]

## Planetary system

In July 2008, the planet [6 Lyncis b](/source/6_Lyncis_b) was announced by Bun'ei Sato and collaborators from the [Okayama Planet Search Program](/source/Okayama_Planet_Search_Program), along with [14 Andromedae b](/source/14_Andromedae_b) and [81 Ceti b](/source/81_Ceti_b). The planet was found to have [minimum mass](/source/Minimum_mass) of 2.4 Jupiter masses and period of 899 days.[5]

## See also

- [14 Andromedae](/source/14_Andromedae)
- [81 Ceti](/source/81_Ceti)
- [HD 167042](/source/HD_167042)
- [Lists of exoplanets](/source/Lists_of_exoplanets)

## References

1. "6 Lyn". Retrieved 2018-05-27.

1. Anderson, E. & Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". *Astronomy Letters*. **38** (5): 331. [arXiv:1108.4971](https://arxiv.org/abs/1108.4971). [Bibcode:2012AstL...38..331A](https://ui.adsabs.harvard.edu/abs/2012AstL...38..331A). [doi:10.1134/S1063773712050015](https://doi.org/10.1134/S1063773712050015). [S2CID 119257644](https://api.semanticscholar.org/CorpusID:119257644)

1. Lépine, Sébastien & Shara, Michael M. (March 2005). "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)". *The Astronomical Journal*. **129** (3): 1483–1522. [arXiv:astro-ph/0412070](https://arxiv.org/abs/astro-ph/0412070). [Bibcode:2005AJ....129.1483L](https://ui.adsabs.harvard.edu/abs/2005AJ....129.1483L). [doi:10.1086/427854](https://doi.org/10.1086/427854). [S2CID 2603568](https://api.semanticscholar.org/CorpusID:2603568)

1. Sato, Bun'ei et al. (2008). ["Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042"](https://academic.oup.com/pasj/article/60/6/1317/1391840). *Publications of the Astronomical Society of Japan*. **60** (6): 1317–1326. [arXiv:0807.0268](https://arxiv.org/abs/0807.0268). [Bibcode:2008PASJ...60.1317S](https://ui.adsabs.harvard.edu/abs/2008PASJ...60.1317S). [doi:10.1093/pasj/60.6.1317](https://doi.org/10.1093/pasj/60.6.1317). [S2CID 67841762](https://api.semanticscholar.org/CorpusID:67841762)

1. Keenan, Philip C. & McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". *Astrophysical Journal Supplement Series*. **71**: 245. [Bibcode:1989ApJS...71..245K](https://ui.adsabs.harvard.edu/abs/1989ApJS...71..245K). [doi:10.1086/191373](https://doi.org/10.1086/191373)

1. Bonfanti, A. et al. (2015). "Revising the ages of planet-hosting stars". *Astronomy and Astrophysics*. **575**: A18. [arXiv:1411.4302](https://arxiv.org/abs/1411.4302). [Bibcode:2015A&A...575A..18B](https://ui.adsabs.harvard.edu/abs/2015A%26A...575A..18B). [doi:10.1051/0004-6361/201424951](https://doi.org/10.1051/0004-6361/201424951). [S2CID 54555839](https://api.semanticscholar.org/CorpusID:54555839)

1. White, T R; Huber, D; Mann, A W; Casagrande, L; Grunblatt, S K; Justesen, A B; Silva Aguirre, V; Bedding, T R; Ireland, M J; Schaefer, G H; Tuthill, P G (2018-07-11). "Interferometric diameters of five evolved intermediate-mass planet-hosting stars measured with PAVO at the CHARA Array". *[Monthly Notices of the Royal Astronomical Society](/source/Monthly_Notices_of_the_Royal_Astronomical_Society)*. **477** (4): 4403–4413. [arXiv:1804.05976](https://arxiv.org/abs/1804.05976). [doi:10.1093/mnras/sty898](https://doi.org/10.1093/mnras/sty898). [ISSN 0035-8711](https://www.worldcat.org/issn/0035-8711)

1. Malla, Sai Prathyusha; Stello, Dennis; Huber, Daniel; Montet, Benjamin T; Bedding, Timothy R; Fredslund Andersen, Mads; Grundahl, Frank; Jessen-Hansen, Jens; Hey, Daniel R; Palle, Pere L; Deng, Licai; Zhang, Chunguang; Chen, Xiaodian; Lloyd, James; Antoci, Victoria (2020-08-21). "Asteroseismic masses of four evolved planet-hosting stars using SONG and TESS: resolving the retired A-star mass controversy". *[Monthly Notices of the Royal Astronomical Society](/source/Monthly_Notices_of_the_Royal_Astronomical_Society)*. **496** (4): 5423–5435. [arXiv:2006.07649](https://arxiv.org/abs/2006.07649). [doi:10.1093/mnras/staa1793](https://doi.org/10.1093/mnras/staa1793). [ISSN 0035-8711](https://www.worldcat.org/issn/0035-8711)

## External links

- Jean Schneider (2011). ["Notes for star 6 Lyn"](https://web.archive.org/web/20080803203049/http://exoplanet.eu/star.php?st=6+Lyn). *[Extrasolar Planets Encyclopaedia](/source/Extrasolar_Planets_Encyclopaedia)*. Archived from [the original](http://exoplanet.eu/star.php?st=6+Lyn) on August 3, 2008. Retrieved 8 October 2011.

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Adapted from the Wikipedia article [6 Lyncis](https://en.wikipedia.org/wiki/6_Lyncis) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/6_Lyncis?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.