HD 166066

Last updated
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

  1. 1 2 3 4 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.
  2. 1 2 3 4 5 6 7 8 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.
  3. 1 2 3 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.
  4. 1 2 3 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.
  5. 1 2 3 4 5 6 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.
  6. 1 2 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.
  7. 1 2 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.
  8. 1 2 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.
  9. ↑ "HD 166066". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved June 25, 2022.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.