HD 40873

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HD 40873
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 04m 29.10628s[1]
Declination +51° 34′ 24.2203″
Apparent magnitude (V) 6.45[2]
Spectral type A7III[3]
U−B color index +0.16[2]
B−V color index +0.18[2]
Radial velocity (Rv) 19.6±2[4] km/s
Proper motion (μ) RA: 0.48±0.67[1] mas/yr
Dec.: −42.83±0.39[1] mas/yr
Parallax (π) 7.41 ± 0.66[1] mas
Distance 440 ± 40 ly
(130 ± 10 pc)
Luminosity 38[5] L
Temperature 7,753[5] K
Rotational velocity (v sin i) 134[6] km/s
Other designations
BD+51° 1146, FK5 2463, HD 40873, HIP 28765, HR 2123, NSV 2804, SAO 25548.
Database references

HD 40873 is a star in the northern constellation of Auriga. Located around 440 light-years distant, it shines with a luminosity approximately 38 times that of the Sun and has a surface temperature of 7,753 K.[5] It is a suspected variable star.[2]


  1. ^ a b c d 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. ^ a b c d Danziger, I. J.; Dickens, R. J. (July 1967), "Spectrophotometry of New Short-Period Variable Stars", Astrophysical Journal 149: 55, Bibcode:1967ApJ...149...55D, doi:10.1086/149231 
  3. ^ Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819 
  4. ^ Evans, D. S. (June 20–24, 1966), Batten, Alan Henry; Heard, John Frederick, eds., "The Revision of the General Catalogue of Radial Velocities", Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 (University of Toronto: International Astronomical Union), Bibcode:1967IAUS...30...57E 
  5. ^ a b c McDonald, I.; et al. (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 
  6. ^ Royer, F.; et al. (October 2002), "Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i", Astronomy and Astrophysics 393: 897–911, arXiv:astro-ph/0205255, Bibcode:2002A&A...393..897R, doi:10.1051/0004-6361:20020943 


NAME Right ascension Declination Apparent magnitude (V) Spectral type Database references
ADS 4633 B (CCDM J06045+5135BC) 06h 04m 30.061s +51° 35' 02.63 9.5 A5 Simbad