31 Camelopardalis

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31 Camelopardalis
Observation data
Epoch J2000      Equinox J2000
Constellation Camelopardalis
Right ascension 05h 54m 57.828s[1]
Declination +59° 53′ 18.12″[1]
Apparent magnitude (V) 5.20[2]
Characteristics
Spectral type A2V[3]
U−B color index +0.03[4]
B−V color index +0.02[4]
Variable type Beta Lyrae variable
Astrometry
Radial velocity (Rv) -2.9 ± 0.9[5] km/s
Proper motion (μ) RA: 2.30 ± 0.54[1] mas/yr
Dec.: -18.43 ± 0.38[1] mas/yr
Parallax (π) 6.96 ± 0.51[1] mas
Distance 470 ± 30 ly
(140 ± 10 pc)
Absolute magnitude (MV) 5.21
Other designations
TU Cam, HR 2027, HD 39220, BD+59°920, FK5 2446, HIP 27971, SAO 25447, GC 7402.
Database references
SIMBAD data

31 Camelopardalis is an eclipsing spectroscopic binary in the constellation Camelopardalis. It is approximately 470 light years from Earth.[1]

The binary system is classified as a white A-type main sequence dwarf with a mean apparent magnitude of +5.20. Both component stars are detached main sequence stars which do not fill their Roche lobes. Because the components regularly eclipse each other, 31 Camelopardalis is classified as a variable star and its brightness varies from magnitude +5.12 to +5.29 with a period of 2.93 days, which is the orbital period of the binary.

References[edit]

  1. ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ Oja, T. (August 1991). "UBV photometry of stars whose positions are accurately known. VI". Astronomy and Astrophysics Supplement Series. 89 (2): 415–419. Bibcode:1991A&AS...89..415O. 
  3. ^ "31 Cam". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 April 2017. 
  4. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M. 
  5. ^ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Bibcode:1953GCRV..C......0W.