HD 166066
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Octans[1] |
| Right ascension | 18h 38m 51.0741s[2] |
| Declination | −85° 42′ 32.2260″[2] |
| Apparent magnitude (V) | 8.10±0.01[3] |
| Characteristics | |
| Spectral type | G0 V[4] |
| B−V color index | +0.59[3] |
| Astrometry | |
| Radial velocity (Rv) | 1.14±2.01[2] km/s |
| Proper motion (μ) | RA: +147.318 mas/yr[2] Dec.: −43.097 mas/yr[2] |
| Parallax (π) | 14.5962±0.1186 mas[2] |
| Distance | 223 ± 2 ly (68.5 ± 0.6 pc) |
| Absolute magnitude (MV) | 4.09[1] |
| Details | |
| Mass | 1.13[5] M☉ |
| Radius | 1.39+0.07 −0.05[6] R☉ |
| Luminosity | 2.12[1] L☉ |
| Surface gravity (log g) | 4.25[5] cgs |
| Temperature | 6,054±80[5] K |
| Metallicity [Fe/H] | −0.03[5] dex |
| Rotational velocity (v sin i) | 5[7] km/s |
| Age | 7.0+2.5 −1.2[8] Gyr |
| Other designations | |
| CD−85°150, CPD−85°478, HD 166066, HIP 91434, GSC 09527-01174[9] | |
| Database references | |
| SIMBAD | data |
HD 166066 is a solitary star located in the southern circumpolar constellation Octans. It has an apparent magnitude of 8.10,[3] making it readily visible in binoculars, but not to the naked eye. The object is located 223 light years away from the Solar System,[2] but is drifting away with a poorly constrained radial velocity of about 1.14 km/s.[2]
HD 166066 has a stellar classification of G0 V, indicating that it is a G-type main sequence star similar to the Sun.[4] However, the calcium H & K lines are narrow and weak for its class.[4] It has 113% the mass of the Sun[5] and 139% its radius, along with twice its luminosity.[1][6]
The iron abundance is 93% that of the Sun, and is slightly hotter, with an effective temperature of 6,054 K[5] compared to the Sun's 5,778 K. HD 166066 is significantly older, with an age of 7 billion years,[8] and rotates modestly with a projected rotational velocity of 5 km/s.[7]
References
- ^ a b c d 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. XHIP record for this object at VizieR.
- ^ a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
- ^ a b c Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
- ^ a b c d e f Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (June 2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s): Improved astrophysical parameters for the Geneva-Copenhagen Survey⋆". Astronomy & Astrophysics. 530: A138. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. ISSN 0004-6361.
- ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.
- ^ a b Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S.; Mowlavi, N. (May 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of ~14 000 F and G dwarfs". Astronomy & Astrophysics. 418 (3): 989–1019. arXiv:astro-ph/0405198. Bibcode:2004A&A...418..989N. doi:10.1051/0004-6361:20035959. ISSN 0004-6361.
- ^ a b Holmberg, J.; Nordström, B.; Andersen, J. (July 2009). "The Geneva-Copenhagen survey of the solar neighbourhood: III. Improved distances, ages, and kinematics". Astronomy & Astrophysics. 501 (3): 941–947. arXiv:0811.3982. Bibcode:2009A&A...501..941H. doi:10.1051/0004-6361/200811191. ISSN 0004-6361.
- ^ "HD 166066". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 25, 2022.