AR Aurigae

AR Aurigae

AR Aurigae
Observation data Epoch J2000      Equinox J2000
Constellation	Auriga
Right ascension	05h 18m 18.8994s
Declination	+33° 46′ 02.454″
Apparent magnitude (V)	6.143
Characteristics
Spectral type	B9.5V
U−B color index	-0.18
B−V color index	-0.06
Variable type	Algol variable
Astrometry
Radial velocity (Rv)	25.4 km/s
Proper motion (μ)	RA: 15.09 mas/yr Dec.: -29.06 mas/yr
Parallax (π)	8.2 ± 0.78 mas
Distance	400 ± 40 ly (120 ± 10 pc)
Absolute magnitude (MV)	6.099
Details
Mass	18 M☉
Radius	7 R☉
Luminosity	20,000 L☉
Temperature	10,000–30,000 K
Rotation	58 km/s 0,0167514 Year
Other designations
GCRV 3147, HIP 24740, 17 Aurigae, HR 1728, TD1 4315, AG+33 490, GSC 02398-01311, 2MASS J05181891+3346025, TYC 2398-1311-1, BD+33 1002, HD 34364, PPM Star Catalogue 70158, UBV 5040, CEL 595, HGAM 380, SAO 57858, uvby98 100034364 V, GC 6476, HIC 24740, SBC7 219, AAVSO 0511+33.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

AR Aurigae (AR Aur) is an eclipsing binary in the constellation Auriga. It is approximately 398 light-years from Earth.

Both components are blue-white B-type or main sequence dwarfs which do not fill their Roche lobes. The system has a with a mean apparent magnitude of +6.15 but because of the eclipses, AR Aurigae is a variable star and its brightness varies from magnitude +6.15 to +6.82 with a period of 4.13 days.

References

• HR 1728
• Image AR Aurigae