Wikipedia
77 Ceti
77 Ceti is a single,[8] orange-hued star located 489[1] light years away in the equatorial constellation of Cetus. It is faintly visible to the naked eye, having an apparent visual magnitude of 5.7.[2] This is an evolved giant star with a stellar classification of K2 III.[3] It is radiating 187 times the Sun's luminosity from its photosphere at an effective temperature of 4,206 K.[9]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 02h 34m 42.62373s[1] |
| Declination | −07° 51′ 34.0113″[1] |
| Apparent magnitude (V) | 5.731[2] |
| Characteristics | |
| Spectral type | K2 III[3] |
| U−B color index | +1.68[4] |
| B−V color index | +1.393±0.008[5] |
| Astrometry | |
| Radial velocity (Rv) | 24.9±2[6] km/s |
| Proper motion (μ) | RA: +59.581[1] mas/yr Dec.: −63.696[1] mas/yr |
| Parallax (π) | 6.6740 ± 0.1337 mas[1] |
| Distance | 489 ± 10 ly (150 ± 3 pc) |
| Absolute magnitude (MV) | +0.01[5] |
| Details | |
| Radius | 25.02+1.39 −4.09[1] R☉ |
| Luminosity | 189.1±4.5[1] L☉ |
| Temperature | 4,279+400 −114[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862.
- ^ a b Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H.
- ^ Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
- ^ 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.
- ^ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Washington. Bibcode:1953GCRV..C......0W.
- ^ "77 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved December 29, 2018.
- ^ 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.
- ^ Chandler, Colin Orion; et al. (2016). "The Catalog of Earth-Like Exoplanet Survey Targets (Celesta): A Database of Habitable Zones Around Nearby Stars". The Astronomical Journal. 151 (3): 59. arXiv:1510.05666. Bibcode:2016AJ....151...59C. doi:10.3847/0004-6256/151/3/59. S2CID 119246448.