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]

77 Ceti

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
BD−08°484, HD 16074, HIP 12002, HR 752, SAO 129984[7]
Database references
SIMBAD	data

References

1. 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.
2. 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.
3. Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars". Michigan Spectral Survey. 5. Bibcode:1999MSS...C05....0H.
4. Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
5. 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.
6. Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication. Washington. Bibcode:1953GCRV..C......0W.
7. "77 Cet". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved December 29, 2018.
8. 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.
9. 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.