| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 17 03 07.87177 |
| Declination | +14° 05′ 31.0117″ |
| Apparent magnitude (V) | 4.97 |
| Characteristics | |
| Spectral type | M3−III |
| B−V color index | 1.600±0.007 |
| Astrometry | |
| Radial velocity (Rv) | +43.15±0.15 km/s |
| Proper motion (μ) | RA: +24.628 mas/yr Dec.: −62.492 mas/yr |
| Parallax (π) | 7.9057 ± 0.2050 mas |
| Distance | 410 ± 10 ly (126 ± 3 pc) |
| Absolute magnitude (MV) | −0.44 |
| Details | |
| Mass | 1.60+1.38 −0.75 M☉ |
| Radius | 59.92+4.78 −13.93 R☉ |
| Luminosity | 614.4±18.2 L☉ |
| Temperature | 3,712+525 −140 K |
| Metallicity | 0.00 dex |
| Other designations | |
| 32 Oph, NSV 8142, BD+14°3179, HD 154143, HIP 83430, HR 6337, SAO 102553 | |
| Database references | |
| SIMBAD | data |
32 Ophiuchi is a single star located 410 light years away from the Sun in the constellation Hercules. It is visible to the naked eye as a dim, red-hued star with an apparent visual magnitude of 4.97. This is an aging red giant star on the asymptotic giant branch with a stellar classification of M3−III. Having exhausted the supply of hydrogen at its core it has expanded to 60 times the girth of the Sun. The star is radiating 614 times the luminosity of the Sun from its swollen photosphere at an effective temperature of around 3,712 K. It is moving further away from the Sun with a heliocentric radial velocity of +43 km/s.
References
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ 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.
- ^ Keenan, P.; McNeil, R. (October 1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245–266, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
- ^ Charbonnel, C.; et al. (January 2020), "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era", Astronomy & Astrophysics, 633: A34, arXiv:1910.12732, Bibcode:2020A&A...633A..34C, doi:10.1051/0004-6361/201936360, ISSN 0004-6361.
- "HD 154143". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-19.
- "HD 154143 (32 Ophiuchi) Star Facts". Universe Guide. 25 January 2015. Retrieved August 29, 2019.
- Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- Eggen, Olin J. (July 1992), "Asymptotic giant branch stars near the sun", Astronomical Journal, 104 (1): 275–313, Bibcode:1992AJ....104..275E, doi:10.1086/116239.
| Constellation of Hercules | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stars |
| ||||||||||||
| |||||||||||||
| |||||||||||||
| |||||||||||||
| Galaxies |
| ||||||||||||
| |||||||||||||
| |||||||||||||
 Category | |||||||||||||