67 Ophiuchi

67 Ophiuchi
Location of 67 Ophiuchi (circled)
Observation data
Epoch J2000      Equinox ICRS
Constellation Ophiuchus
Right ascension 18h 00m 38.71619s
Declination +02° 55′ 53.6324″
Apparent magnitude (V) 3.93
Characteristics
Spectral type B5Ib
U−B color index −0.62
B−V color index +0.03
Astrometry
Radial velocity (Rv)−5.20 km/s
Proper motion (μ) RA: +1.15 mas/yr
Dec.: −9.35 mas/yr
Parallax (π)2.65±0.54 mas
Distance2,020±200 ly
(620±60 pc)
Absolute magnitude (MV)−3.5
Details
Mass12.6±0.4 M☉
Radius31±4 R☉
Luminosity39,800+9,200
−7,500 L☉
Surface gravity (log g)3.03 cgs
Temperature14,700±300 K
Metallicity [Fe/H]−0.01 dex
Rotational velocity (v sin i)40 km/s
Age16.6+1.6
−1.5 Myr
Other designations
BD+02°3458, CCDM J18007+0256A, FK5 677, GC 24509, HIP 88192, HR 6714, HD 164353, SAO 123013, WDS J18006+0256A
Database references
SIMBADdata

67 Ophiuchi (67 Oph) is a class B5 Ib (blue supergiant) star in the constellation Ophiuchus. Its apparent magnitude is 3.93 and it is approximately 2,000 light years away based on spectroscopy. It is considered to be a member of the open cluster Collinder 359 (Melotte 186).

67 Oph has four companions. The closest is a magnitude 13.7 B1 main sequence star at 8.29", designated B. Component C (BD+02°3459) is the brightest close companion, a magnitude 8.1 B2 main sequence star at 54.32". Component D is a magnitude 12.5 star 8.37" from component C. Component E is a magnitude 10.9 star 46.53" from 67 Oph A.

This star was once considered part of the obsolete constellation Taurus Poniatovii, but after the International Astronomical Union officially recognized constellations, it was placed in Ophiuchus.

References

  1. 1 2 3 4 5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
  2. 1 2 3 4 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. 1 2 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): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  5. 1 2 3 4 5 6 7 Weßmayer, D.; Przybilla, N.; Butler, K. (2022-12-01). "Quantitative spectroscopy of B-type supergiants". Astronomy & Astrophysics. 668: A92. arXiv:2208.02692. Bibcode:2022A&A...668A..92W. doi:10.1051/0004-6361/202243973. ISSN 0004-6361.
  6. ↑ 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. S2CID 119257644. Vizier catalog entry
  7. 1 2 Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. arXiv:1009.1491. Bibcode:2011A&A...525A..71W. doi:10.1051/0004-6361/201015014. S2CID 53480665.
  8. ↑ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573 (1): 359–365. Bibcode:2002ApJ...573..359A. doi:10.1086/340590.
  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
  10. ↑ Ian Ridpath. "Taurus Poniatovii". Star Tales. Retrieved 2023-11-01.

Further reading