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) 5.197
Characteristics
Spectral type A2V
U−B color index 0.03
B−V color index 0.02
Variable type Beta Lyrae variable
Astrometry
Radial velocity (Rv)-2.9 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)5.214
Details
Mass3,1 M
Radius2,1 R
Luminosity40 L
Temperature7,500–10,000 K
Rotation76 Km/s
0,0080219 Year
Other designations
TU Camelopardalis, HR 2027, HD 39220, BD+59°920, FK5 2446, HIP 27971, SAO 25447, GC 7402.
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

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


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