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51 Orionis

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This article is about b Orionis. Not to be confused withβ (beta) Orionis.
51 Orionis
Location of 51 Orionis (circled)
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]
Distance299 ± 6ly
(92 ± 2pc)
Absolute magnitude(MV)0.13[5]
Details
Mass1.11[5]M☉
Radius19.3+0.4
−1.0[1]R☉
Luminosity132±3[1]L☉
Surface gravity(logg)2.24[6]cgs
Temperature4,458+92
−51[1]K
Metallicity[Fe/H]−0.45[6]dex
Rotational velocity(vsini)1.1[7]km/s
Age4.06[8]Gyr
Other designations
b Ori,51 Ori,BD+01°1105,FK52427,GC7136,HD37984,HIP26885,HR1963,SAO113056[9]
Database references
SIMBADdata

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

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  1. ^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.
  2. ^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.
  3. ^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.
  4. ^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.
  5. ^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
  6. ^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.
  7. ^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
  8. ^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.
  9. ^ab"51 Ori".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2019-07-29.
  10. ^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.
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