V382 Carinae

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V382 Carinae
V382 Carinae.jpg
V382 Carinae star.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 11h08m35.4s
Declination −58°58′30″
Apparent magnitude (V) +3.93
Characteristics
Spectral type G0-4-Ia+[1]
U−B color index +0.94
B−V color index +1.23
Astrometry
Radial velocity (Rv) +7.2 km/s
Proper motion (μ) RA: −4.97 mas/yr
Dec.: 1.67 mas/yr
Parallax (π) 0.52 ± 0.17 mas
Distance 8.9k ly
(2.7k[1] pc)
Absolute magnitude (MV) −9.0[1]
Details
Mass 20[1] M
Radius 700[1] R
Luminosity 319,000[1] L
Surface gravity (log g) 0.400[2] cgs
Temperature 5,200[1] K
Metallicity 0.320[2]
Other designations
x Carinae, HR 4337, HD 96918, CP−58°3189, FK5 1289, HIP 54463, SAO 238813, GC 15329
Database references
SIMBAD data

V382 Carinae, also known as x Carinae (x Car), is a star in the constellation Carina. V382 Carinae is a yellow G-type yellow hypergiant with a mean apparent magnitude of +3.93. It is 8,900 light years from Earth. It is a variable star of low amplitude, and is 700 times the size of our Sun.

This is the brightest yellow hypergiant in the night sky, easily visible to the naked eye and brighter than rho Cassiopeiae although not visible from much of the northern hemisphere. The low infrared excess suggest that V382 Carinae may be cooling towards a red supergiant phase, less common than yellow hypergiants evolving towards hotter temperatures.[1][3]

References[edit]

  1. ^ a b c d e f g h Achmad, L. et al (1992). "A photometric study of the G0-4 Ia(+) hypergiant HD 96918 (V382 Carinae)". Astronomy and Astrophysics 259: 600-606. Bibcode:1992A&A...259..600A. 
  2. ^ a b Soubiran, C.; Le Campion, J. -F.; Cayrel De Strobel, G.; Caillo, A. (2010). "The PASTEL catalogue of stellar parameters". Astronomy and Astrophysics 515: A111. Bibcode:2010A&A...515A.111S. doi:10.1051/0004-6361/201014247.  edit
  3. ^ Stothers, R. B.; Chin, C. W. (2001). "Yellow Hypergiants as Dynamically Unstable Post–Red Supergiant Stars". The Astrophysical Journal 560 (2): 934. Bibcode:2001ApJ...560..934S. doi:10.1086/322438.  edit