71 Ophiuchi
 
| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 18h 07m 18.35921s[1] |
| Declination | 8° 44′ 01.9156″[1] |
| Apparent magnitude (V) | 4.64[2] |
| Characteristics | |
| Spectral type | G8III[3] |
| U−B color index | +0.73[4] |
| B−V color index | +0.97[4] |
| Astrometry | |
| Radial velocity (Rv) | -3.00[5] km/s |
| Proper motion (μ) | RA: +8.28[1] mas/yr Dec.: +29.45[1] mas/yr |
| Parallax (π) | 11.96 ± 0.28[1] mas |
| Distance | 273 ± 6 ly (84 ± 2 pc) |
| Absolute magnitude (MV) | 0.03[2] |
| Details | |
| Mass | 2.64[6] M☉ |
| Radius | 14.25[6] R☉ |
| Luminosity | 105[6] L☉ |
| Surface gravity (log g) | 2.57[6] cgs |
| Temperature | 4,895[6] K |
| Metallicity [Fe/H] | -0.04[6] dex |
| Rotational velocity (v sin i) | 2.2[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
71 Ophiuchi is a class G8III[3] (yellow giant) star in the constellation Ophiuchus. Its apparent magnitude is 4.64[2] and it is approximately 273 light years away based on parallax.[1]
References
- 1 2 3 4 5 6 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 - 1 2 3 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
- 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.
- 1 2 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
- ↑ Jofré, E.; Petrucci, R.; Saffe, C.; Saker, L.; Artur de la Villarmois, E.; Chavero, C.; Gómez, M.; Mauas, P. J. D. (2015). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy & Astrophysics. 574: A50. arXiv:1410.6422. Bibcode:2015A&A...574A..50J. doi:10.1051/0004-6361/201424474. Vizier catalog entry
- 1 2 3 4 5 6 Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015). "Precise radial velocities of giant stars". Astronomy & Astrophysics. 574: A116. arXiv:1412.4634. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360. Vizier catalog entry
- ↑ 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
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