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21 Camelopardalis

From Wikipedia, the free encyclopedia
Star in the constellation Camelopardalis
21 Camelopardalis
Observation data
Epoch J2000.0      Equinox J2000.0
ConstellationCamelopardalis
Right ascension05h 40m 28.99683s[1]
Declination+61° 56′ 56.0999″[1]
Apparent magnitude (V)6.867[2]
Characteristics
Spectral typeA5[3]
B−Vcolor index+0.22[4]
Astrometry
Radial velocity (Rv)−15.5[5] km/s
Proper motion (μ)RA: −6.911[1]mas/yr
Dec.: +1.818[1]mas/yr
Parallax (π)5.0131±0.0864 mas[1]
Distance650 ± 10 ly
(199 ± 3 pc)
Absolute magnitude (MV)0.90[6]
Details
Radius3.121[7] R☉
Luminosity35.66[6] L☉
Temperature7,619[7] K
Other designations
21 Cam,BD+61°806,FK5 1150,HD 37136,HIP 26700,SAO 13564[8]
Database references
SIMBADdata

21 Camelopardalis is astar in the northerncircumpolar constellation ofCamelopardalis, located around 650 light years away from the Sun.[1] It is a challenge to view with the naked eye even under excellent viewing conditions, having anapparent visual magnitude of 6.9.[2] This is one of the fainter stars with aFlamsteed designation, one of only 220 below the magnitude cutoff for theBright Star Catalogue.[9] It is moving closer to the Earth with a heliocentricradial velocity of −15.5 km/s.[5]

The spectral type for 21 Camelopardalis is given only as A5 with no published luminosity class. It is treated as a normalmain sequence star,[10] although it is calculated to be larger and more luminous than a typical A5 main sequence star.[7][11] Based upon changes to itsproper motion over time, this is a probableastrometric binary.[12]

References

[edit]
  1. ^abcdefBrown, 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 atVizieR.
  2. ^abPaunzen, E. (2015). "A new catalogue of Strömgren-Crawford uvbyβ photometry".Astronomy & Astrophysics.580: A23.arXiv:1506.04568.Bibcode:2015A&A...580A..23P.doi:10.1051/0004-6361/201526413.S2CID 73623700.
  3. ^Eggen, O. J. (1985)."Hyades and Sirius supercluster members brighter than magnitude(V) 7.1. I - the first six hours of right ascension".Astronomical Society of the Pacific.97: 807.Bibcode:1985PASP...97..807E.doi:10.1086/131607.
  4. ^Soubiran, C.; Le Campion, J.-F.; Cayrel De Strobel, G.; Caillo, A. (2010). "The PASTEL catalogue of stellar parameters".Astronomy and Astrophysics.515: A111.arXiv:1004.1069.Bibcode:2010A&A...515A.111S.doi:10.1051/0004-6361/201014247.S2CID 118362423.
  5. ^abWilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities".Washington.Bibcode:1953GCRV..C......0W.
  6. ^abAnderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation".Astronomy Letters.38 (5): 331.arXiv:1108.4971.Bibcode:2012AstL...38..331A.doi:10.1134/S1063773712050015.S2CID 119257644.
  7. ^abcMasana, E.; Jordi, C.; Ribas, I. (2006). "Effective temperature scale and bolometric corrections from 2MASS photometry".Astronomy and Astrophysics.450 (2): 735.arXiv:astro-ph/0601049.Bibcode:2006A&A...450..735M.doi:10.1051/0004-6361:20054021.S2CID 15278668.
  8. ^"21 Cam".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2019-04-17.
  9. ^Bidelman, W. P. (1990). "Flamsteed stars not contained in the Yale "Catalogue of Bright Stars"".Bulletin d'Information du Centre de Données Stellaires.38: 13.Bibcode:1990BICDS..38...13B.
  10. ^Jordi, C.; Figueras, F.; Torra, J.; Asiain, R. (1996). "UvbyHbeta_ photometry of main sequence A type stars".Astronomy and Astrophysics Supplement.115: 401.Bibcode:1996A&AS..115..401J.
  11. ^Habets, G. M. H. J.; Heintze, J. R. W. (1981). "Empirical bolometric corrections for the main-sequence".Astronomy and Astrophysics Supplement Series.46: 193.Bibcode:1981A&AS...46..193H.
  12. ^Frankowski, A.; Jancart, S.; Jorissen, A. (March 2007), "Proper-motion binaries in the Hipparcos catalogue. Comparison with radial velocity data",Astronomy and Astrophysics,464 (1):377–392,arXiv:astro-ph/0612449,Bibcode:2007A&A...464..377F,doi:10.1051/0004-6361:20065526,S2CID 14010423
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