Astronomy:Gliese 282
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Monoceros |
| Right ascension | 07h 39m 59.33s[1] |
| Declination | −03° 35′ 51.0″ |
| Apparent magnitude (V) | (7.30 + 9.01)[2] |
| Characteristics | |
| Spectral type | K2V[3] + K7V[4] + M1.5Ve[5] |
| Apparent magnitude (U) | 12.9 |
| Apparent magnitude (B) | 11.844 |
| Apparent magnitude (V) | 10.385 |
| Apparent magnitude (R) | 9.365 |
| Apparent magnitude (I) | 8.065 |
| Apparent magnitude (J) | 6.795 |
| Apparent magnitude (H) | 6.306 |
| Apparent magnitude (K) | 6.032 |
| Variable type | A: BY Dra[6] |
| Astrometry | |
| Radial velocity (Rv) | −18.15[7] km/s |
| Proper motion (μ) | RA: 69.90[1] mas/yr Dec.: -278.33[1] mas/yr |
| Parallax (π) | 91.65 ± 3.50[1] mas |
| Distance | 36 ± 1 ly (10.9 ± 0.4 pc) |
| Details | |
| Gl 282 A | |
| Surface gravity (log g) | 4.40[8] cgs |
| Temperature | 4,956[8] K |
| Metallicity [Fe/H] | −0.12[8] dex |
| Rotational velocity (v sin i) | 1.77[6] km/s |
| Age | 300−350[5] Myr |
| Gl 282 B | |
| Metallicity [Fe/H] | −0.25[9] dex |
| Age | 680−720[5] Myr |
| Other designations | |
| Gl 282 A: BD−03° 2001, SAO 134954 | |
| Gl 282 B: BD−03° 2002, SAO 134958 | |
| Gl 282 C: G 112-29, NLTT 18149 | |
| Database references | |
| SIMBAD | AB |
| A | |
| B | |
| C | |
| ARICNS | A |
| B | |
| C | |
Gliese 282 is a star system composed of four stars in the equatorial constellation of Monoceros. At a distance of 36 light years, this star has an apparent magnitude of 7.26 when viewed from Earth. It is not visible to the naked eye.
The Gl 282AB star system is composed of two K- type main-sequence stars. The primary component, Gliese 282A, is a BY Draconis type variable star with a stellar classification of K2V. It has an effective temperature of 4,956 K. The companion, Gliese 282B, is a smaller, class K5V star. As of 2003, the pair had an angular separation of 58.30 arc seconds along a position angle of 113°.[2] This is equivalent to a projected physical separation of 824 AU.[5]
There is a distant common proper motion companion (G 112-29) at an angular separation of 1.09°. At the estimated distance of Gl 282AB, this corresponds to a projected separation of 55,733 AU, making it one of the widest known physical companions. Initially believed to be a red dwarf star with a stellar classification of M1.5Ve,[5] it turned out to be a pair of red dwarfs (Ca and Cb) with masses 0.55M☉ and 0.19M☉, orbiting each other on 6591+136−177 days orbit.[11]
References
- ↑ 1.0 1.1 1.2 1.3 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466–3471, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22.
- ↑ Montes, D. et al. (2001), "Late-type members of young stellar kinematic groups - I. Single stars", Monthly Notices of the Royal Astronomical Society 328 (1): 45–63, doi:10.1046/j.1365-8711.2001.04781.x, Bibcode: 2001MNRAS.328...45M, http://eprints.ucm.es/30941/1/castrorubio18libre.pdf, retrieved 2018-11-04.
- ↑ Gray, R. O. et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal 132 (1): 161–170, doi:10.1086/504637, Bibcode: 2006AJ....132..161G.
- ↑ 5.0 5.1 5.2 5.3 5.4 Poveda, A. et al. (November 2009), "G 112-29 (=NLTT 18149): A Very Wide Companion to GJ 282 AB with a Common Proper Motion, Common Parallax, Common Radial Velocity, and Common Age", The Astrophysical Journal 706 (1): 343–347, doi:10.1088/0004-637X/706/1/343, Bibcode: 2009ApJ...706..343P.
- ↑ 6.0 6.1 Mishenina, T. V. et al. (November 2012), "Activity and the Li abundances in the FGK dwarfs", Astronomy & Astrophysics 547: 8, doi:10.1051/0004-6361/201118412, A106, Bibcode: 2012A&A...547A.106M.
- ↑ Nidever, David L et al. (August 2002), "Radial Velocities for 889 Late-Type Stars", The Astrophysical Journal Supplement Series 141 (2): 503–522, doi:10.1086/340570, Bibcode: 2002ApJS..141..503N.
- ↑ 8.0 8.1 8.2 Mishenina, T. V. et al. (April 2013), "Abundances of neutron-capture elements in stars of the Galactic disk substructures", Astronomy & Astrophysics 552: 12, doi:10.1051/0004-6361/201220687, A128, Bibcode: 2013A&A...552A.128M.
- ↑ Newton, Elisabeth R. et al. (January 2014), "Near-infrared Metallicities, Radial Velocities, and Spectral Types for 447 Nearby M Dwarfs", The Astronomical Journal 147 (1): 24, doi:10.1088/0004-6256/147/1/20, 20, Bibcode: 2014AJ....147...20N.
- ↑ "HD 61606". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+61606.
- ↑ Baroch, D. et al. (2021), "The CARMENES search for exoplanets around M dwarfs", Astronomy & Astrophysics 653: A49, doi:10.1051/0004-6361/202141031
External links
- University of Hamburg. "NEXXUS - The database for Nearby X-ray and extreme UV emitting Stars". http://www.hs.uni-hamburg.de/DE/For/Gal/Xgroup/nexxus/starpage.cgi?identifier=0414. Retrieved 21 May 2012.
- University of Hamburg. "NEXXUS - The database for Nearby X-ray and extreme UV emitting Stars". http://www.hs.uni-hamburg.de/DE/For/Gal/Xgroup/nexxus/starpage.cgi?identifier=0415. Retrieved 21 May 2012.
- "K stars within 100 light-years". SolStation. http://www.solstation.com/stars3/100-ks.htm. Retrieved 26 May 2012.
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