21 Camelopardalis

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21 Camelopardalis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 05h 40m 28.99621s[1]
Declination +61° 56′ 56.0658″[1]
Apparent magnitude (V) 6.867[2]
Spectral type A5[3]
B−V color index +0.22[4]
Radial velocity (Rv) −15.5[5] km/s
Proper motion (μ) RA: −8.711[6] mas/yr
Dec.: +5.551[6] mas/yr
Parallax (π) 5.70 ± 0.66[6] mas
Distance approx. 570 ly
(approx. 180 pc)
Radius 3.121[7] R
Temperature 7,619[7] K
Other designations
21 Cam, HD 37136, HIP 26700, BD+61°806, SAO 13564
Database references

21 Camelopardalis (21 Cam) is a star in the constellation Camelopardalis. Its apparent magnitude is 6.9. It is one of the fainter stars with a Flamsteed designation, one of only 220 below the magnitude cutoff for the Bright Star Catalogue.[8]

The spectral type for 21 Camelopardalis is given only as A5 with no published luminosity class. It is treated as a normal main sequence star,[9] although it is calculated to be larger and more luminous than a typical A5 main sequence star.[7][10]


  1. ^ a b Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ Paunzen, E. (2015). "A new catalogue of Strömgren-Crawford uvbyβ photometry". Astronomy & Astrophysics. 580: A23. arXiv:1506.04568Freely accessible. Bibcode:2015A&A...580A..23P. doi:10.1051/0004-6361/201526413. 
  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:1004.1069Freely accessible. Bibcode:2010A&A...515A.111S. doi:10.1051/0004-6361/201014247. 
  5. ^ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Washington. Bibcode:1953GCRV..C......0W. 
  6. ^ a b c Gaia Collaboration (2016). "VizieR Online Data Catalog: Gaia DR1 (Gaia Collaboration, 2016)". VizieR On-line Data Catalog: I/337. Originally published in: Astron. Astrophys. 1337. Bibcode:2016yCat.1337....0G. 
  7. ^ a b c Masana, E.; Jordi, C.; Ribas, I. (2006). "Effective temperature scale and bolometric corrections from 2MASS photometry". Astronomy and Astrophysics. 450 (2): 735. arXiv:astro-ph/0601049Freely accessible. Bibcode:2006A&A...450..735M. doi:10.1051/0004-6361:20054021. 
  8. ^ Bidelman, W. P. (1990). "Flamsteed stars not contained in the Yale "Catalogue of Bright Stars"". Bulletin d'Information du Centre de Donnees Stellaires. 38: 13. Bibcode:1990BICDS..38...13B. 
  9. ^ 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. 
  10. ^ 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.