Summary
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.
| Observation data Epoch J2000 Equinox 2000 | |
|---|---|
| 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 mas[1] |
| 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 | |
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 edit
- ^ a b c d van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ a b Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22.
- ^ Montes, D.; et al. (2001), "Late-type members of young stellar kinematic groups - I. Single stars" (PDF), Monthly Notices of the Royal Astronomical Society, 328 (1): 45–63, arXiv:astro-ph/0106537, Bibcode:2001MNRAS.328...45M, doi:10.1046/j.1365-8711.2001.04781.x, S2CID 55727428, archived from the original (PDF) on 2017-09-22, 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, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992.
- ^ a b c d e 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, arXiv:0910.2956, Bibcode:2009ApJ...706..343P, doi:10.1088/0004-637X/706/1/343, S2CID 116938161.
- ^ a b Mishenina, T. V.; et al. (November 2012), "Activity and the Li abundances in the FGK dwarfs", Astronomy & Astrophysics, 547: 8, arXiv:1210.6843, Bibcode:2012A&A...547A.106M, doi:10.1051/0004-6361/201118412, S2CID 119287319, A106.
- ^ 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, S2CID 51814894.
- ^ a b c Mishenina, T. V.; et al. (April 2013), "Abundances of neutron-capture elements in stars of the Galactic disk substructures", Astronomy & Astrophysics, 552: 12, arXiv:1303.1730, Bibcode:2013A&A...552A.128M, doi:10.1051/0004-6361/201220687, S2CID 119268097, A128.
- ^ 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, arXiv:1310.1087, Bibcode:2014AJ....147...20N, doi:10.1088/0004-6256/147/1/20, S2CID 26818462, 20.
- ^ "HD 61606". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-01-05.
{{cite web}}: CS1 maint: postscript (link) - ^ Baroch, D.; et al. (2021), "The CARMENES search for exoplanets around M dwarfs", Astronomy & Astrophysics, 653: A49, arXiv:2105.14770, doi:10.1051/0004-6361/202141031, S2CID 235253852
External links edit
- University of Hamburg. "NEXXUS - The database for Nearby X-ray and extreme UV emitting Stars". Retrieved 21 May 2012.
- University of Hamburg. "NEXXUS - The database for Nearby X-ray and extreme UV emitting Stars". Retrieved 21 May 2012.
- "K stars within 100 light-years". SolStation. Retrieved 26 May 2012.