28 Monocerotis

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28 Monocerotis
Observation data
Epoch J2000      Equinox J2000
Constellation Monoceros
Right ascension 08h 01m 13.33574s[1]
Declination −1° 23′ 33.3935″[1]
Apparent magnitude (V) 4.69[2]
Spectral type K4III[3]
U−B color index +1.76[4]
B−V color index +1.49[4]
Radial velocity (Rv) +26.70[5] km/s
Proper motion (μ) RA: +67.60[1] mas/yr
Dec.: -76.26[1] mas/yr
Parallax (π) 7.25 ± 0.30[1] mas
Distance 450 ± 20 ly
(138 ± 6 pc)
Absolute magnitude (MV) -1.00[2]
Luminosity 578[2] L
Surface gravity (log g) 1.68[6] cgs
Temperature 4,165[7] K
Metallicity [Fe/H] -0.26[2] dex
Rotational velocity (v sin i) 2.2[8] km/s
Other designations
BD-00 1882, FK5 2620, GC 10870, HIP 39211, HR 3141, HD 65953, SAO 135380, V645 Mon
Database references

28 Monocerotis is a class K4III[3] (orange giant) star in the constellation Monoceros. Its apparent magnitude is 4.69[2] and it is approximately 450 light years away based on parallax.[1]

It is an FK Comae Berenices variable, with a magnitude varying by 0.02 with a period of 0.21 days.[9]


  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 e 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
  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. ^ a b Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M. Vizier catalog entry
  5. ^ 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. arXiv:1606.08053Freely accessible. doi:10.1134/S1063773706110065. 
  6. ^ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. Bibcode:2016A&A...591A.118S. arXiv:1605.07384Freely accessible. doi:10.1051/0004-6361/201628497. 
  7. ^ 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: 343. Bibcode:2012MNRAS.427..343M. arXiv:1208.2037Freely accessible. doi:10.1111/j.1365-2966.2012.21873.x.  Vizier catalog entry
  8. ^ 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
  9. ^ 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....1.2025S.