Astronomy:32 Ophiuchi
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Short description: Star in the constellation Hercules
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Hercules |
| Right ascension | 17h 03m 07.87177s[1] |
| Declination | +14° 05′ 31.0117″[1] |
| Apparent magnitude (V) | 4.97[2] |
| Characteristics | |
| Spectral type | M3−III[3] |
| B−V color index | 1.600±0.007[2] |
| Astrometry | |
| Radial velocity (Rv) | +43.15±0.15[2] km/s |
| Proper motion (μ) | RA: +24.628[1] mas/yr Dec.: −62.492[1] mas/yr |
| Parallax (π) | 7.9057 ± 0.2050[1] mas |
| Distance | 410 ± 10 ly (126 ± 3 pc) |
| Absolute magnitude (MV) | −0.44[2] |
| Details | |
| Mass | 1.60+1.38 −0.75[4] M☉ |
| Radius | 59.92+4.78 −13.93[1] R☉ |
| Luminosity | 614.4±18.2[1] L☉ |
| Temperature | 3,712+525 −140[1] K |
| Metallicity [Fe/H] | 0.00[4] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
32 Ophiuchi[6] is a single[7] star located 410[1] 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.[2] This is an aging red giant star on the asymptotic giant branch[8] with a stellar classification of M3−III.[3] Having exhausted the supply of hydrogen at its core it has expanded to 60[1] times the girth of the Sun. The star is radiating 614[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of around 3,712 K.[1] It is moving further away from the Sun with a heliocentric radial velocity of +43 km/s.[2]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Keenan, P.; McNeil, R. (October 1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245–266, doi:10.1086/191373, Bibcode: 1989ApJS...71..245K.
- ↑ 4.0 4.1 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, doi:10.1051/0004-6361/201936360, ISSN 0004-6361, Bibcode: 2020A&A...633A..34C.
- ↑ "HD 154143". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+154143.
- ↑ "HD 154143 (32 Ophiuchi) Star Facts". Universe Guide. https://www.universeguide.com/star/32ophiuchi.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Eggen, Olin J. (July 1992), "Asymptotic giant branch stars near the sun", Astronomical Journal 104 (1): 275–313, doi:10.1086/116239, Bibcode: 1992AJ....104..275E.
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