NO Aurigae

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NO Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 40m 42.05023s[1]
Declination +31° 55′ 14.1920″[1]
Apparent magnitude (V) 6.21[2] (6.06 - 6.44[3])
Spectral type M2Iab
U−B color index +2.22[4]
B−V color index +2.09[4]
R−I color index 1.41[4]
Variable type LC[3]
Radial velocity (Rv) 7.21 ± 0.45[5] km/s
Proper motion (μ) RA: 0.13 ± 0.47[1] mas/yr
Dec.: -3.65 ± 0.26[1] mas/yr
Parallax (π) 1.68 ± 0.47 mas
Distance approx. 1,900 ly
(approx. 600 pc)
Absolute magnitude (MV) −5.88[2]
Mass 4.93[6] M
Radius 630[2] R
Luminosity 75,000[2] L
Surface gravity (log g) 0.1[2] cgs
Temperature 3,700[2] K
Other designations
BD+31° 1049, HD 37536, HIP 26718, HR 1939, SAO 58322.
Database references
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

NO Aurigae is an S-type star in the constellation Auriga. It is a slow irregular pulsating variable star of small amplitude, ranging from apparent magnitude 6.05 to 6.50 in 102 days.[7] Located around 1900 light-years distant, it shines with a luminosity approximately 7938 times that of the Sun and has a surface temperature of 3500 K.[8] Alternate calculations give it a temperature of 3450 K, luminosity 6968 times that of the sun and mass of 4.93 solar masses.[6]


  1. ^ a b c d Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b c d e f Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought". The Astrophysical Journal 628 (2): 973. arXiv:astro-ph/0504337. Bibcode:2005ApJ...628..973L. doi:10.1086/430901. 
  3. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S 1. Bibcode:2009yCat....102025S. 
  4. ^ a b c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode:2002yCat.2237....0D. 
  5. ^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics 430: 165. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. 
  6. ^ a b Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten 331 (4): 349, arXiv:1003.2335, Bibcode:2010AN....331..349H, doi:10.1002/asna.200911355 
  7. ^ Otero, Sebastian Alberto (5 September 2012). "NO Aurigae". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 22 July 2015. 
  8. ^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.