5 Camelopardalis

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5 Camelopardalis
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 04h 55m 03.12443s[1]
Declination +55° 15′ 32.7912″[1]
Apparent magnitude (V) 5.522[2]
Spectral type B9.5V[3]
U−B color index +0.001[2]
B−V color index +0.038[2]
Radial velocity (Rv) +2.4[4] km/s
Proper motion (μ) RA: -16.96[1] mas/yr
Dec.: -8.65[1] mas/yr
Parallax (π) 5.26 ± 0.59[1] mas
Distance approx. 620 ly
(approx. 190 pc)
Luminosity 178[5] L
Temperature 8,475[5] K
Rotational velocity (v sin i) 102[6] km/s
Other designations
BD+55° 941, FK5 2367, HD 30958, HIP 22854, HR 1555, SAO 24904.
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

5 Camelopardalis is a star in the northern circumpolar constellation of Camelopardalis. With an apparent magnitude of 5.5, it can be seen with the naked eye. This is a B-type main sequence star with a stellar classification of B9.5V.[3] It is spinning rapidly with a projected rotational velocity of 102 km/s,[6] and is radiating 178 the luminosity of the Sun.[5] It has a probable astrometric companion at an angular separation of 12.9″.[7] The pair are located about 620 light years away.[1]


  1. ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357 
  2. ^ a b c Markkanen, T. (1977), "The magnetic pocket. An observational study of structure of the galactic magnetic field and of interstellar dust in the direction of the alpha Per cluster.", Observatory and Astrophysics Laboratory, University of Helsinki, Report 1, Bibcode:1977HelR....1....0M 
  3. ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819 
  4. ^ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington D.C., Bibcode:1953GCRV..C......0W 
  5. ^ a b c McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x 
  6. ^ a b Royer, F.; et al. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224 
  7. ^ Eggleton, P. P.; et al. (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 

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