HD 92063

This article is about t¹ Carinae. For t² Carinae, see HD 92397.

HD 92063 is a single^[8] star in the southern constellation of Carina. It has the Bayer designation t¹ Carinae, while HD 92063 is the star's identifier from the Henry Draper Catalogue. This is a suspected variable star^[4] and is visible to the naked eye with an apparent visual magnitude of 5.08.^[2] The star is located at a distance of approximately 246 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −10 km/s.^[1] Although it appears at the edge of the Carina Nebula, it is much closer than the nebula. It is also not considered a member of the nearby Alessi 5 open cluster of stars.^[9]

HD 92063

Carina Nebula with HD 92603 near the right edge of the frame
Observation data Epoch J2000      Equinox J2000
Constellation	Carina
Right ascension	10h 36m 20.51819s[1]
Declination	−59° 33′ 51.8102″[1]
Apparent magnitude (V)	5.08[2]
Characteristics
Spectral type	K1III[3]
B−V color index	1.172±0.005[2]
Variable type	suspected[4]
Astrometry
Radial velocity (Rv)	−10.15±0.19[1] km/s
Proper motion (μ)	RA: −40.984±0.229[1] mas/yr Dec.: −39.180±0.226[1] mas/yr
Parallax (π)	13.2367 ± 0.1354 mas[1]
Distance	246 ± 3 ly (75.5 ± 0.8 pc)
Absolute magnitude (MV)	0.55[2]
Details
Mass	1.2[5] M☉
Radius	13.85+0.26 −1.17[1] R☉
Luminosity	72.1±0.9[1] L☉
Surface gravity (log g)	2.25[5] cgs
Temperature	4,520+204 −41[1] K
Metallicity [Fe/H]	+0.02[5] dex
Rotational velocity (v sin i)	<1.2[6] km/s
Other designations
t1 Car, NSV 4909, CPD−58°2371, GC 14594, HD 92063, HIP 51912, HR 4164, SAO 238242[7]
Database references
SIMBAD	data

This is an aging K-type giant star with a stellar classification of K1III,^[3] having exhausted the supply of hydrogen at its core then cooled and expanded off the main sequence. At present it has 14^[1] times the radius of the Sun. The star is radiating 72^[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,520 K.^[1]

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. 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.
3. Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
4. Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017), "General catalogue of variable stars: Version GCVS 5.1", Astronomy Reports, 61 (1): 80, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
5. Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics, 628: A94, arXiv:1904.11302, Bibcode:2019A&A...628A..94A, doi:10.1051/0004-6361/201935765, S2CID 131780028.
6. De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014), "A catalog of rotational and radial velocities for evolved stars", Astronomy & Astrophysics, 561: A126, arXiv:1312.3474, Bibcode:2014A&A...561A.126D, doi:10.1051/0004-6361/201220762, S2CID 54046583.
7. "HD 92063". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-07-12.
8. 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
9. Cantat-Gaudin, T.; et al. (July 2018), "Characterising open clusters in the solar neighbourhood with the Tycho-Gaia Astrometric Solution", Astronomy & Astrophysics, 615: 15, arXiv:1801.10042, Bibcode:2018A&A...615A..49C, doi:10.1051/0004-6361/201731251, S2CID 56324345, A49.

External links

• Ford, Dominic. "The star T¹-Car - In-The-Sky.org". in-the-sky.org. Retrieved 2018-05-16.