Astronomy:Gliese 282
From HandWiki
Short description: Star in the constellation Monoceros
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Monoceros[1] |
| Right ascension | 07h 39m 59.329s[2] |
| Declination | −03° 35′ 51.03″[2] |
| Apparent magnitude (V) | 7.30[3] + 9.01[3] + 9.87[4] |
| Characteristics | |
| Spectral type | K2V[5] + K7V[6] + M1.5Ve[7] |
| Variable type | A: BY Dra[8] |
| Astrometry | |
| A | |
| Radial velocity (Rv) | −18.40±0.14[2] km/s |
| Proper motion (μ) | RA: +70.078[2] mas/yr Dec.: −278.117[2] mas/yr |
| Parallax (π) | 71.0323 ± 0.0243[2] mas |
| Distance | 45.92 ± 0.02 ly (14.078 ± 0.005 pc) |
| Absolute magnitude (MV) | +6.42[1] |
| Orbit[9] | |
| Primary | Ca |
| Companion | Cb |
| Period (P) | 18.254+0.116 −0.117 yr |
| Eccentricity (e) | 0.227±0.001 |
| Inclination (i) | 93.137+0.087 −0.086° |
| Longitude of the node (Ω) | 136.616+0.165 −0.167° |
| Argument of periastron (ω) (secondary) | 181.395+0.738 −0.736° |
| Details | |
| Gl 282 A | |
| Radius | 0.78[2] R☉ |
| Luminosity | 0.29[2] L☉ |
| Surface gravity (log g) | 4.40[10] cgs |
| Temperature | 4,956[10] K |
| Metallicity [Fe/H] | −0.12[10] dex |
| Rotational velocity (v sin i) | 1.77[8] km/s |
| Age | 300−350[7] Myr |
| Gl 282 B | |
| Mass | 0.64[11] M☉ |
| Radius | 0.73[11] R☉ |
| Luminosity | 0.11[11] L☉ |
| Surface gravity (log g) | 4.47[11] cgs |
| Temperature | 3,874[11] K |
| Metallicity [Fe/H] | −0.25[12] dex |
| Age | 680−720[7] Myr |
| Gl 282 Ca | |
| Mass | 0.539+0.008 −0.007[9] M☉ |
| Radius | 0.51±0.05[9] R☉ |
| Luminosity | 0.044±0.01[9] L☉ |
| Rotation | 12.2±0.1[9] days |
| Age | 740±100[9] Myr |
| Gl 282 Cb | |
| Mass | 0.185±0.001[9] M☉ |
| 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 46 light years, this star has an apparent magnitude of 7.26[citation needed] 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°.[3] This is equivalent to a projected physical separation of 824 AU.[7]
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 (0.88128 light-years), making it one of the widest known physical companions. Initially believed to be a red dwarf star with a stellar classification of M1.5Ve,[7] 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.[14]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 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.
- ↑ Koen, C.; Kilkenny, D.; Van Wyk, F.; Marang, F. (2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society 403 (4): 1949. doi:10.1111/j.1365-2966.2009.16182.x. Bibcode: 2010MNRAS.403.1949K.
- ↑ 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.
- ↑ 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.
- ↑ 7.0 7.1 7.2 7.3 7.4 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.
- ↑ 8.0 8.1 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.
- ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 Biller, B. A.; Grandjean, A.; Messina, S.; Desidera, S.; Delorme, P.; Lagrange, A.-M.; Hambsch, F.-J.; Mesa, D. et al. (February 2022), "Dynamical masses for two M1 + mid-M dwarf binaries monitored during the SPHERE-SHINE survey", Astronomy & Astrophysics 658: A145, doi:10.1051/0004-6361/202142438, ISSN 0004-6361.
- ↑ 10.0 10.1 10.2 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.
- ↑ 11.0 11.1 11.2 11.3 11.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 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.
 |  |
