Location of 67 Ophiuchi (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 18 00 38.71619 |
| Declination | 2° 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 |
| Distance | 2020±200 ly (620±60 pc) |
| Absolute magnitude (MV) | −3.5 |
| Details | |
| Mass | 12.6±0.4 M☉ |
| Radius | 31±4 R☉ |
| Luminosity | 39,800+9,200 −7,500 L☉ |
| Surface gravity (log g) | 3.03 cgs |
| Temperature | 14,700±300 K |
| Metallicity | -0.01 dex |
| Rotational velocity (v sin i) | 40 km/s |
| Age | 16.6+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 | |
| SIMBAD | data |
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
- ^ 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
- ^ 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.
- ^ 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.
- 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.
- ^ 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.
- 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
- ^ 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.
- 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.
- 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
- Ian Ridpath. "Taurus Poniatovii". Star Tales. Retrieved 2023-11-01.
Further reading
- Underhill, A. B. (1960). "Some spectroscopic observations of the supergiants 67 Ophiuchi, 55 Cygni and χ Orionis". Publ. Dominion Astrophys. Obs. 11: 353–361. Bibcode:1960PDAO...11..353U.
- Lodieu, N. (2005). "A study of the young open cluster Collinder 359". Astronomische Nachrichten. 326 (10): 1001–1006. Bibcode:2005AN....326.1001L. doi:10.1002/asna.200510436.
