Luyten's Star
Luyten's Star (GJ 273) is a red dwarf star in the constellation Canis Minor. It is located at a distance of around 12.36 light-years and has a visual magnitude of 9.9, making it too faint to be viewed with the unaided eye. It is named after Willem Jacob Luyten, who first determined its proper motion.
This star is approximately a quarter the mass of the Sun.[3] The projected rotation rate of this star[6] is too low to be measured, but is no greater than 1 km/s.[7]
Closest approach and encounters
At present, Luyten's Star is moving away from the Solar System. The closest approach occurred about 13,000 years ago when it came within 3.67 parsecs.[8] The star is currently located 1.2 light years distant from Procyon, and the latter would appear as a visual magnitude −4.5 star in the night sky of a hypothetical planet orbiting Luyten's Star.[9] The closest encounter between the two stars occurred about 600 years ago when Luyten's Star was at its minimal distance of about 1.12 ly from Procyon.[10] The space velocity components of Luyten's Star are U = +16, V = −66 and W = -17 km/s.[10][11][12]
In fiction
In Larry Niven's Known Space stories, Luyten's Star is Down's primary (known as "L5 1668", a corrupted designation).
See also
References
- ^ a b c d Perryman, M. A. C. et al. (1997), "The Hipparcos Catalogue", Astronomy & Astrophysics 323: L49–L52, Bibcode 1997A&A...323L..49P
- ^ a b c d Koen, C.; Kilkenny, D.; van Wyk, F.; Cooper, D.; Marang, F. (July 2002). "UBV(RI)C photometry of Hipparcos red stars". Monthly Notices of the Royal Astronomical Society 334 (1): 20−38. Bibcode 2002MNRAS.334...20K. doi:10.1046/j.1365-8711.2002.05403.x.
- ^ a b c d "The One Hundred Nearest Stars". Research Consortium on Nearby Stars. 2009-01-01. http://www.chara.gsu.edu/RECONS/TOP100.posted.htm. Retrieved 2009-09-03.
- ^ a b Nidever, David L. et al (August 2002). "Radial Velocities for 889 Late-Type Stars". The Astrophysical Journal Supplement Series 141 (2): 503−522. arXiv:astro-ph/0112477. Bibcode 2002ApJS..141..503N. doi:10.1086/340570.
- ^ Viti, S.; Jones, H. R. A.; Richter, M. J.; Barber, R. J.; Tennyson, J.; Lacy, J. H. (August 2008). "A potential new method for determining the temperature of cool stars". Monthly Notices of the Royal Astronomical Society 388 (3): 1305−1313. Bibcode 2008MNRAS.388.1305V. doi:10.1111/j.1365-2966.2008.13489.x.
- ^ This is denoted by v sin i, where v is the rotational velocity at the equator and i is the inclination to the line of sight.
- ^ Reiners, A. (May 2007). "The narrowest M-dwarf line profiles and the rotation-activity connection at very slow rotation". Astronomy and Astrophysics 467 (1): 259−268. arXiv:astro-ph/0702634. Bibcode 2007A&A...467..259R. doi:10.1051/0004-6361:20066991.
- ^ García-Sánchez, J. et al (2001). "Stellar encounters with the solar system". Astronomy and Astrophysics 379: 634−659. Bibcode 2001A&A...379..634G. doi:10.1051/0004-6361:20011330.
- ^ Schaaf, Fred (2008). The Brightest Stars: Discovering the Universe Through the Sky's Most Brilliant Stars. John Wiley and Sons. p. 169. ISBN 047170410.
- ^ a b "Annotations on LHS 33 object". SIMBAD. Centre de Données astronomiques de Strasbourg. http://cdsannotations.u-strasbg.fr/annotations/simbadObject/971564. Retrieved 2010-04-21.
- ^ Delfosse, X.; Forveille, T.; Perrier, C.; Mayor, M. (March 1998). "Rotation and chromospheric activity in field M dwarfs". Astronomy and Astrophysics 331: 581−595. Bibcode 1998A&A...331..581D.
- ^ "ARICNS star page of GJ 273". Astronomisches Rechen-Institut Heidelberg. http://www.ari.uni-heidelberg.de/datenbanken/aricns/cnspages/4c00562.htm. Retrieved 2010-04-21.
External links
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← Star systems within 10–15 light-years →
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In left column are stellar classes of primary members of star systems. ‡Distance error margin extends out of declared distance interval. Bold are systems containing at least one component with absolute magnitude of +8.5 or brighter. Italic are systems possibly located within declared distance interval, but probably not.
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