31 Camelopardalis

31 Camelopardalis

Observation data Epoch J2000      Equinox J2000
Constellation	Camelopardalis
Right ascension	05h 54m 57.828s
Declination	+59° 53′ 18.12″
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 mas/yr Dec.: -18.43 ± 0.38 mas/yr
Parallax (π)	6.96 ± 0.51 mas
Distance	470 ± 30 ly (140 ± 10 pc)
Absolute magnitude (MV)	5.214
Details
Mass	3,1 M☉
Radius	2,1 R☉
Luminosity	40 L☉
Temperature	7,500–10,000 K
Rotation	76 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
SIMBAD	data
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.

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

• HR 2027
• Image 31 Camelopardalis