51 Orionis
Observation data EpochJ2000EquinoxJ2000 | |
---|---|
Constellation | Orion |
Right ascension | 05h42m28.63240s[1] |
Declination | +01° 28′ 28.6714″[1] |
Apparent magnitude(V) | 4.90[2] |
Characteristics | |
Spectral type | K1III[3] |
U−Bcolor index | +1.06[2] |
B−Vcolor index | +1.17[2] |
Astrometry | |
Radial velocity(Rv) | +87.55[4]km/s |
Proper motion(μ) | RA:−54.741[1]mas/yr Dec.:−14.732[1]mas/yr |
Parallax(π) | 10.9178 ± 0.2225mas[1] |
Distance | 299 ± 6ly (92 ± 2pc) |
Absolute magnitude(MV) | 0.13[5] |
Details | |
Mass | 1.11[5]M☉ |
Radius | 19.3+0.4 −1.0[1]R☉ |
Luminosity | 132±3[1]L☉ |
Surface gravity(logg) | 2.24[6]cgs |
Temperature | 4,458+92 −51[1]K |
Metallicity[Fe/H] | −0.45[6]dex |
Rotational velocity(vsini) | 1.1[7]km/s |
Age | 4.06[8]Gyr |
Other designations | |
Database references | |
SIMBAD | data |
51 Orionisis a single[10]starin theequatorialconstellationofOrion.[9]It has theBayer designationb Orionis,while51 Orionisis theFlamsteed designation.This object is visible to the naked eye as a faint, orange-hued star with anapparent visual magnitudeof 4.90.[2]It is located approximately 299light-yearsaway from theSunbased onparallax,[1]and is drifting further away with aradial velocityof +88 km/s.[4]
This is an aginggiant starwith astellar classificationof K1III,[3]having exhausted the supply of hydrogen at itscoreand expanded to 19 times theSun's radius.[1]It is four[8]billion years old with 1.11[5]times themass of the Sun.The star is radiating 132[1]times theSun's luminosityfrom its enlargedphotosphereat aneffective temperatureof 4,458 K.[1]
References
[edit]- ^abcdefghijklBrown, A. G. A.;et al. (Gaia collaboration) (August 2018)."GaiaData Release 2: Summary of the contents and survey properties ".Astronomy & Astrophysics.616.A1.arXiv:1804.09365.Bibcode:2018A&A...616A...1G.doi:10.1051/0004-6361/201833051.Gaia DR2 record for this sourceatVizieR.
- ^abcdDucati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system".CDS/ADC Collection of Electronic Catalogues.2237.Bibcode:2002yCat.2237....0D.
- ^abHoffleit, D.; Warren, W. H. (1995). "Bright Star Catalogue".VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H.5050(5th Revised ed.).Bibcode:1995yCat.5050....0H.
- ^abMassarotti, Alessandro; et al. (2008)."Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity".The Astronomical Journal.135(1): 209–231.Bibcode:2008AJ....135..209M.doi:10.1088/0004-6256/135/1/209.
- ^abcDa Silva, Ronaldo; et al. (2015). "Homogeneous abundance analysis of FGK dwarf, subgiant, and giant stars with and without giant planets".Astronomy & Astrophysics.580:A24.arXiv:1505.01726.Bibcode:2015A&A...580A..24D.doi:10.1051/0004-6361/201525770.S2CID119216425.Vizier catalog entry
- ^abWu, Yue; et al. (2010). "Coudé-feed stellar spectral library – atmospheric parameters".Astronomy & Astrophysics.525:A71.arXiv:1009.1491.Bibcode:2011A&A...525A..71W.doi:10.1051/0004-6361/201015014.S2CID53480665.
- ^De Medeiros, J. R.; Mayor, M (1999). "A catalog of rotational and radial velocities for evolved stars".Astronomy and Astrophysics Supplement Series.139(3): 433.arXiv:astro-ph/0608248.Bibcode:1999A&AS..139..433D.doi:10.1051/aas:1999401.Vizier catalog entry
- ^abLuck, R. Earle (2015). "Abundances in the Local Region. I. G and K Giants".Astronomical Journal.150(3). 88.arXiv:1507.01466.Bibcode:2015AJ....150...88L.doi:10.1088/0004-6256/150/3/88.S2CID118505114.
- ^ab"51 Ori".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2019-07-29.
- ^Eggleton, P. P.; Tokovinin, A. A. (September 2008)."A catalogue of multiplicity among bright stellar systems".Monthly Notices of the Royal Astronomical Society.389(2): 869–879.arXiv:0806.2878.Bibcode:2008MNRAS.389..869E.doi:10.1111/j.1365-2966.2008.13596.x.S2CID14878976.