HD 34626

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HD 34626
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension  05h 20m 33.03671s[1]
Declination +36° 37′ 56.0298″[1]
Apparent magnitude (V) 8.16[2]
Spectral type B1.5 IVnp[3]
U−B color index −0.68[4]
B−V color index +0.03[4]
Radial velocity (Rv)-6[5] km/s
Proper motion (μ) RA: +0.56[1] mas/yr
Dec.: -3.87[1] mas/yr
Parallax (π)2.07 ± 0.86[1] mas
Distanceapprox. 1,600 ly
(approx. 500 pc)
Mass7.30±0.48[2] M
Luminosity1,897[2] L
Temperature22,675[2] K
Rotational velocity (v sin i)310[6] km/s
Other designations
MZ Aurigae, MZ Aur, BD+36° 1090, HD 34626, HIP 24938, SAO 57915.
Database references

HD 34626, also known as MZ Aurigae, is an unusual variable star in the northern constellation of Auriga. It varies in brightness by 0.1 magnitude over time scales of 8 to 12 hours, but these variations are not periodic. This indicates the variability is not caused by ellipsoidal effects, and the nature of the variability remains unknown, it is a Be star and is rotating rapidly.[6]


  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357Vizier catalog entry
  2. ^ a b c d Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349–360, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355
  3. ^ Walborn, N. R. (1971). "Some Spectroscopic Characteristics of the OB Stars: An Investigation of the Space Distribution of Certain OB Stars and the Reference Frame of the Classification". The Astrophysical Journal Supplement Series. 23: 257. Bibcode:1971ApJS...23..257W. doi:10.1086/190239.
  4. ^ a b Deutschman, W. A.; Davis, R. J.; Schild, R. E. (February 1976), "The galactic distribution of interstellar absorption as determined from the Celescope catalog of ultraviolet stellar observations and a new catalog of UBV, H-beta photoelectric observations", Astrophysical Journal Supplement Series, 30: 97–225, Bibcode:1976ApJS...30...97D, doi:10.1086/190359
  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. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  6. ^ a b Percy, J. R. (December 1984), "Five suspected Beta Cephei stars revisited", Journal of the Royal Astronomical Society of Canada, 78: 241–250, Bibcode:1984JRASC..78..241P

External links[edit]