31 Camelopardalis

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] (A0IV + F0)[4]
U−B color index +0.03[5]
B−V color index +0.02[5]
Variable type Beta Lyrae variable
Astrometry
Radial velocity (Rv)-2.9 ± 0.9[6] 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
Distance470 ± 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
SIMBADdata

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

  1. 1 2 3 4 5 6 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. 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. ↑ Mezzetti, M.; et al. (1980). "Revised photometric elements of eight eclipsing binaries". Astronomy and Astrophysics Supplement Series. 42: 15–22. Bibcode:1980A&AS...42...15M.
  5. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M.
  6. ↑ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Bibcode:1953GCRV..C......0W.


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