V420 Aurigae

V420 Aurigae

Observation data Epoch J2000      Equinox J2000
Constellation	Auriga
Right ascension	05^h 22^m 35.23145^s[1]
Declination	+37° 40′ 33.629″[1]
Apparent magnitude (V)	7.49[2]
Characteristics
Spectral type	B0IVpe[3]
U−B color index	−0.88[2]
B−V color index	+0.16[2]
Variable type	High-mass X-ray binary[4]
Astrometry
Radial velocity (Rv)	−20.5±4.4[5] km/s
Proper motion (μ)	RA: +1.25[1] mas/yr Dec.: -4.38[1] mas/yr
Parallax (π)	−0.04 ± 0.72[1] mas
Other designations
BD+37° 1160, HD 34921, HIP 25114, SAO 57950.
Database references
SIMBAD	data

V420 Aurigae is a high-mass star with an inferred compact companion. Closely orbiting each other every 0.8 days, they are a source of X-ray emission.^[4]

References

1. van Leeuwen, F. (November 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.
2. Lutz, J. H.; Lutz, T. E. (June 1972), "UBV and Hgamma observations of early-type field stars", Astronomical Journal 77: 376, Bibcode:1972AJ.....77..376L, doi:10.1086/111296.
3. Hiltner, W. A. (October 1956), "Photometric, Polarization, and Spectrographic Observations of O and B Stars.", Astrophysical Journal Supplement 2: 389, Bibcode:1956ApJS....2..389H, doi:10.1086/190029.
4. Percy, John R.; et al. (February 2004), "Short-Period Variable Be Stars Discovered or Confirmed through Self-Correlation Analysis of Hipparcos Epoch Photometry", The Publications of the Astronomical Society of the Pacific 116 (816): 178−183, Bibcode:2004PASP..116..178P, doi:10.1086/382246.
5. Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system", Astronomy Letters 32 (11): 759–771, Bibcode:2006AstL...32..759G, doi:10.1134/S1063773706110065.

External links

• HIC 25114
• Image V420 Aurigae

Coordinates: 05^h 22^m 35.2305^s, +37° 40′ 33.629″