56 Orionis

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56 Orionis
Orion constellation map.svg
Red circle.svg

Location of 56 Orionis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
Right ascension 05h 52m 26.43854s[1]
Declination 1° 51′ 18.4958″[1]
Apparent magnitude (V) 4.76[2]
Spectral type K1.5IIb[3]
U−B color index +1.46[4]
B−V color index +1.38[4]
Radial velocity (Rv) +11.56[5] km/s
Proper motion (μ) RA: -7.16[1] mas/yr
Dec.: -8.24[1] mas/yr
Parallax (π) 2.59 ± 0.30[1] mas
Distance approx. 1,300 ly
(approx. 390 pc)
Absolute magnitude (MV) -3.14[2]
Mass 6.4[6] M
Luminosity 3473[2] L
Surface gravity (log g) 0.91[7] cgs
Temperature 4,295[7] K
Metallicity [Fe/H] -0.07[7] dex
Rotational velocity (v sin i) 3.5[8] km/s
Other designations
BD+01°1151, CCDM J05524+0151A, FK5 2444, GC 7380, HIP 27750, HR 2037, HD 39400, NSV 2690, SAO 113220, WDS J05524+0151A
Database references

56 Orionis is a class K1.5IIb[3] (orange bright giant) star in the constellation Orion. Its apparent magnitude is 4.76[2] and it is approximately 1260 light years away based on parallax.[1]

It has one reported companion, B, with magnitude 13.5 and separation 42.9".[9]


  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. 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 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M. Vizier catalog entry
  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". Astronomy & Astrophysics. 430: 165. arXiv:astro-ph/0409579Freely accessible. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. 
  6. ^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190. arXiv:1007.4883Freely accessible. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.  Vizier catalog entry
  7. ^ a b c Earle Luck, R. (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137. 
  8. ^ De Medeiros, J. R.; Mayor, M. (1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433. Bibcode:1999A&AS..139..433D. doi:10.1051/aas:1999401.  Vizier catalog entry
  9. ^ 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