RT Carinae

RT Carinae

RT Carinae is the bright orange star south of the Trumpler 15 cluster.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 10h 44m 47.148s[1]
Declination −59° 24′ 48.1228″[1]
Apparent magnitude (V) 8.36[2] (8.2 - 9.9[3])
Characteristics
Spectral type M2+ Iab[4]
B−V color index +2.31[2]
Variable type LC[3]
Astrometry
Radial velocity (Rv)−21.95±0.58[1] km/s
Proper motion (μ) RA: −7.432 mas/yr[1]
Dec.: 2.851 mas/yr[1]
Parallax (π)0.470 ± 0.069 mas[5]
Distanceapprox. 7,000 ly
(approx. 2,100 pc)
Absolute magnitude (MV)−6.74[2]
Details[2]
Radius1,090 R☉
Luminosity (bolometric)129,000+33,000
−24,000[6] L☉
Surface gravity (log g)−0.3 cgs
Temperature3,625 K
Other designations
RT Car, HD 303310, HIP 52562, SAO 238424, CD−58°3538, AAVSO 1040-58
Database references
SIMBADdata

RT Carinae, also known as CD-58 3538, is a red supergiant and a variable star, located 7,000 light years away in the constellation Carina. It is in the Carina Nebula. The average apparent magnitude of +8.55, too faint to be visible to the naked eye.

  1. ^ a b c d 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.
  2. ^ a b c d Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought". The Astrophysical Journal. 628 (2): 973. arXiv:astro-ph/0504337. Bibcode:2005ApJ...628..973L. doi:10.1086/430901.
  3. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
  4. ^ Keenan, P.; McNeil, R. (October 1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245–266. Bibcode:1989ApJS...71..245K. doi:10.1086/191373. S2CID 123149047.
  5. ^ Cite error: The named reference Berlanas was invoked but never defined (see the help page).
  6. ^ Davies, Ben; Beasor, Emma R. (March 2020). "The 'red supergiant problem': the upper luminosity boundary of Type II supernova progenitors". MNRAS. 493 (1): 468–476. arXiv:2001.06020. Bibcode:2020MNRAS.493..468D. doi:10.1093/mnras/staa174. S2CID 210714093.