R Aurigae

R Aurigae (R Aur) is a M-type giant star in the constellation of Auriga.[1] It has an apparent visual magnitude which varies between 6.7 and 13.9.[2]

R Aurigae

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Auriga
Right ascension	05^h 17^m 17.6907^s[1]
Declination	+53° 35′ 10.042″[1]
Apparent magnitude (V)	6.7 to 13.9[2]
Characteristics
Spectral type	M7III[1]
U−B color index	+0.27[3]
B−V color index	+1.66[3]
Variable type	M[2]
Astrometry
Radial velocity (Rv)	7.8 ± 2[1] km/s
Proper motion (μ)	RA: 2.28[1] mas/yr Dec.: −14.68[1] mas/yr
Parallax (π)	2.42 ± 1.60[1] mas
Distance	approx. 1,300 ly (approx. 400 pc)
Absolute magnitude (MV)	2[4]
Details
Radius	300[5] R☉
Other designations
R Aur, ADS 3845 A, BD+53 882, CCDM J05173+5335A, GC 6435, HD 34019, HIP 24645, HR 1707, IDS 05092+5328 A, SAO 25112.[1]
Database references
SIMBAD	data

References

1. "V* R Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 10, 2009.
2. R Aur, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 10, 2009.
3. HR 1707, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 10, 2009.
4. From apparent magnitude and parallax.
5. HD 34019, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line November 10, 2009.