51 Orionis

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51 Orionis
Orion constellation map.svg
Red circle.svg
Location of 51 Orionis (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Orion
Right ascension 05h 42m 28.63240s [1]
Declination +01° 28′ 28.6714″ [1]
Apparent magnitude  (V)4.90 [2]
Characteristics
Spectral type K1III [3]
U−B color index +1.06 [2]
B−V color 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 ± 0.2225  mas [1]
Distance 299 ± 6  ly
(92 ± 2  pc)
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 (log g)2.24 [6]   cgs
Temperature 4,458+92
−51 [1]   K
Metallicity [Fe/H]−0.45 [6]   dex
Rotational velocity (v sin i)1.1 [7]  km/s
Age 4.06 [8]   Gyr
Other designations
b Ori, 51 Ori, BD+01°1105, FK5  2427, GC  7136, HD  37984, HIP  26885, HR  1963, SAO  113056 [9]
Database references
SIMBAD data

51 Orionis is a single [10] star in the equatorial constellation of Orion. [9] It has the Bayer designation b Orionis, while 51 Orionis is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.90. [2] It is located approximately 299  light-years away from the Sun based on parallax, [1] and is drifting further away with a radial velocity of +88 km/s. [4]

This is an aging giant star with a stellar classification of K1III, [3] having exhausted the supply of hydrogen at its core and expanded to 19 times the Sun's radius. [1] It is four [8]  billion years old with 1.11 [5] times the mass of the Sun. The star is radiating 132 [1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,458 K. [1]

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<span class="mw-page-title-main">43 Sagittarii</span> Star in the constellation of Sagittarius

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References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data 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 source at VizieR.
  2. 1 2 3 4 Ducati, 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. 1 2 Hoffleit, 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. 1 2 Massarotti, 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. 1 2 3 Da 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. S2CID   119216425. Vizier catalog entry
  6. 1 2 Wu, 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. S2CID   53480665.
  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. 1 2 Luck, 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. S2CID   118505114.
  9. 1 2 "51 Ori". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-07-29.
  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 . S2CID   14878976.
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