Mu Ophiuchi

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μ Ophiuchi
Ophiuchus constellation map.svg
Red circle.svg
Location of μ Ophiuchi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 17h 37m 50.71309s[1]
Declination −8° 07′ 07.5749″[1]
Apparent magnitude (V) 4.62[2]
Spectral type B8II-IIIp:Mn[3]
U−B color index -0.20[2]
B−V color index +0.11[2]
Radial velocity (Rv)-18.50[4] km/s
Proper motion (μ) RA: -11.31[1] mas/yr
Dec.: -20.47[1] mas/yr
Parallax (π)4.32 ± 0.20[1] mas
Distance750 ± 30 ly
(230 ± 10 pc)
Absolute magnitude (MV)-2.24[5]
Luminosity659[5] L
Temperature12,790[6] K
Metallicity [Fe/H]0.00[7] dex
Rotational velocity (v sin i)95[8] km/s
Other designations
BD-08°4472, 57 Ophiuchi, FK5 3399, GC 23889, HIP 86284, HR 6567, HD 159975, SAO 141772
Database references

Mu Ophiuchi (μ Oph) is a class B8II-III[3] (blue giant) star in the constellation Ophiuchus. Its apparent magnitude is 4.62[2] and it is approximately 760 light years away based on parallax.[1]


  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. 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. arXiv:1606.08053. 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. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. Vizier catalog entry
  6. ^ Zorec, J.; Cidale, L.; Arias, M. L.; Frémat, Y.; Muratore, M. F.; Torres, A. F.; Martayan, C. (2009). "Fundamental parameters of B supergiants from the BCD system". Astronomy and Astrophysics. 501: 297. arXiv:0903.5134. Bibcode:2009A&A...501..297Z. doi:10.1051/0004-6361/200811147.
  7. ^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031. Vizier catalog entry
  8. ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573: 359. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.