Gamma Monocerotis

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γ Monocerotis
Monoceros constellation map.svg
Red circle.svg

Location of γ Monocerotis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Monoceros
Right ascension 06h 14m 51.33367s[1]
Declination −06° 16′ 29.1880″[1]
Apparent magnitude (V) 3.96[2]
Spectral type K1.5IIIBa0.3[3]
U−B color index +1.42[2]
B−V color index +1.31[2]
Radial velocity (Rv) −4.8[4] km/s
Proper motion (μ) RA: −4.69[1] mas/yr
Dec.: −19.30[1] mas/yr
Parallax (π) 6.55 ± 0.19[1] mas
Distance 500 ± 10 ly
(153 ± 4 pc)
Absolute magnitude (MV) -1.93[5]
Luminosity 1021[5] L
Surface gravity (log g) 1.61[6] cgs
Temperature 4,375[6] K
Metallicity [Fe/H] -0.15[6] dex
Rotational velocity (v sin i) 4.0[7] km/s
Other designations
5 Monocerotis, HD 43232, SAO 133012, FK5 2475, GC 7986, HR 2227, HIP 29651, BD−06 1469, CCDM J06149-0616A, WDS J06149-0617A
Database references

γ Monocerotis, Latinised as Gamma Monocerotis, is a star in the constellation of Monoceros. It is an orange giant with spectral class K.[3] Its apparent magnitude is 3.96[2] and it is approximately 498 light years away based on parallax.[1]

It has reported companions B, at separation 53.7" and magnitude 13.1, and C, at separation 47.9" and magnitude 13.6.[8]


  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d 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. 
  3. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H. 
  4. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  5. ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971Freely accessible. doi:10.1134/S1063773712050015.  Vizier catalog entry
  6. ^ a b c Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. Bibcode:2011A&A...525A..71W. arXiv:1009.1491Freely accessible. doi:10.1051/0004-6361/201015014. 
  7. ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. Bibcode:2014A&A...561A.126D. arXiv:1312.3474Freely accessible. doi:10.1051/0004-6361/201220762.  Vizier catalog entry
  8. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.  Vizier catalog entry