94 Piscium is a single[9] star in the zodiac constellation Pisces,[8] located 305 light years away from the Sun.[1] It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.495.[2] The object is moving closer to the Earth with a heliocentric radial velocity of −43 km/s.[5] It is a possible member of the Wolf 630 moving group.[10]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pisces |
| Right ascension | 01h 26m 41.67906s[1] |
| Declination | +19° 14′ 25.5356″[1] |
| Apparent magnitude (V) | 5.495[2] |
| Characteristics | |
| Evolutionary stage | horizontal branch |
| Spectral type | K1 III[3] |
| B−V color index | 1.106±0.005[4] |
| Astrometry | |
| Radial velocity (Rv) | −42.53±0.09[5] km/s |
| Proper motion (μ) | RA: 51.382[1] mas/yr Dec.: -58.041[1] mas/yr |
| Parallax (π) | 10.6874 ± 0.1404 mas[1] |
| Distance | 305 ± 4 ly (94 ± 1 pc) |
| Absolute magnitude (MV) | 0.84[4] |
| Details | |
| Mass | 1.34[6] M☉ |
| Radius | 12.8+0.1 −0.4[1] R☉ |
| Luminosity | 68.759±1.058[1] L☉ |
| Surface gravity (log g) | 2.45±0.10[7] cgs |
| Temperature | 4,665±42[7] K |
| Metallicity [Fe/H] | −0.03±0.04[7] dex |
| Age | 4.1[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an evolved K-type giant star with a stellar classification of K1 III.[3] It is a red clump giant, which indicates it is on the horizontal branch and is generating energy through helium fusion at its core.[11] The star is 4.1 billion years old with 1.34[6] times the mass of the Sun and 13 times the Sun's radius. It is radiating 69[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,665 K.[7]
References
edit- ^ a b c d e f g h i 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.
- ^ a b Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- ^ a b McWilliam, Andrew (1990). "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances". The Astrophysical Journal Supplement Series. 74: 1075. Bibcode:1990ApJS...74.1075M. doi:10.1086/191527.
- ^ a b 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.
- ^ a b Famaey, B.; Jorissen, A.; Luri, X; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
- ^ a b c Martig, Marie; Fouesneau, Morgan; Rix, Hans-Walter; Ness, Melissa; Mészáros, Szabolcs; García-Hernández, D. A.; Pinsonneault, Marc; Serenelli, Aldo; Aguirre, Victor Silva; Zamora, Olga (2016). "Red giant masses and ages derived from carbon and nitrogen abundances". Monthly Notices of the Royal Astronomical Society. 456 (4): 3655. arXiv:1511.08203. Bibcode:2016MNRAS.456.3655M. doi:10.1093/mnras/stv2830. S2CID 54647886.
- ^ a b c d Bubar, Eric J.; King, Jeremy R. (2010). "Spectroscopic Abundances and Membership in the Wolf 630 Moving Group". The Astronomical Journal. 140 (2): 293. arXiv:1005.1205. Bibcode:2010AJ....140..293B. doi:10.1088/0004-6256/140/2/293. S2CID 118455341.
- ^ a b "94 Psc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-25.
- ^ Eggleton, P. P.; Tokovinin, A. A. (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.
- ^ Bubar, Eric J.; King, Jeremy R. (August 2010), "Spectroscopic Abundances and Membership in the Wolf 630 Moving Group", The Astronomical Journal, 140 (2): 293–318, arXiv:1005.1205, Bibcode:2010AJ....140..293B, doi:10.1088/0004-6256/140/2/293, S2CID 118455341.
- ^ Tautvaišienė, G.; et al. (December 2010), "C, N and O abundances in red clump stars of the Milky Way", Monthly Notices of the Royal Astronomical Society, 409 (3): 1213–1219, arXiv:1007.4064, Bibcode:2010MNRAS.409.1213T, doi:10.1111/j.1365-2966.2010.17381.x, S2CID 119182458