72 Ophiuchi

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72 Ophiuchi
Ophiuchus constellation map.svg
Red circle.svg

Location of 72 Ophiuchi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 18h 07m 20.98393s[1]
Declination 9° 33′ 49.8501″[1]
Apparent magnitude (V) 3.73[2]
Spectral type A5 V[3]
U−B color index +0.10[2]
B−V color index +0.12[2]
Radial velocity (Rv) -23.90[4] km/s
Proper motion (μ) RA: -62.17[1] mas/yr
Dec.: +79.66[1] mas/yr
Parallax (π) 37.55 ± 0.21[1] mas
Distance 86.9 ± 0.5 ly
(26.6 ± 0.1 pc)
Absolute magnitude (MV) 1.58[5]
Mass 1.99[6] M
Radius 1.9[7] R
Luminosity 20[6] L
Surface gravity (log g) 4.04[8] cgs
Temperature 8,718[8] K
Metallicity [Fe/H] +0.09[5] dex
Rotational velocity (v sin i) 65[6] km/s
Other designations
BD+09 3564, CCDM J18073+0934A, FK5 680, GC 24695, GJ 9615 A, HIP 88771, HR 6771, HD 165777, SAO 123142, WDS J18073+0934A
Database references

72 Ophiuchi (72 Oph) is a class A5 main sequence star in the constellation Ophiuchus. Its apparent magnitude is 3.73[2] and it is approximately 86.9 light years away based on parallax.[1]

72 Ophiuchi is a multiple star system with several components; the primary has been reported as a spectroscopic binary, and there are also components B, with magnitude 13.9 and separation 25", C, with magnitude 11.5 and separation 64" (possibly optical),[9] and D, with magnitude 14.8 and separation 24".[10]


  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 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. ^ Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Robinson, P. E. (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I". The Astronomical Journal. 126 (4): 2048. arXiv:astro-ph/0308182Freely accessible. Bibcode:2003AJ....126.2048G. doi:10.1086/378365. 
  4. ^ Kharchenko, N.V.; Scholz, R.-D.; Piskunov, A.E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ∼55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878Freely accessible. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. 
  5. ^ a b 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
  6. ^ a b c Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052Freely accessible. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.  Vizier catalog entry
  7. ^ Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. arXiv:astro-ph/9911002Freely accessible. Bibcode:1999A&A...352..555A.  Vizier catalog entry
  8. ^ a b David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154Freely accessible. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146.  Vizier catalog entry
  9. ^ Renson, P.; Manfroid, J. (2009). "Catalogue of Ap, Hg Mn and Am stars". Astronomy and Astrophysics. 498 (3): 961. Bibcode:2009A&A...498..961R. doi:10.1051/0004-6361/200810788. 
  10. ^ 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