V382 Carinae
 
| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Carina |
| Right ascension | 11h 08m 35.39s[1] |
| Declination | −58° 58′ 30.1″[1] |
| Apparent magnitude (V) | +3.83[2] (3.84 - 4.02[3]) |
| Characteristics | |
| Spectral type | G0-4-Ia+[4] |
| U−B color index | +0.96[2] |
| B−V color index | +1.26[2] |
| Astrometry | |
| Radial velocity (Rv) | +6.00[5] km/s |
| Proper motion (μ) | RA: −4.97[1] mas/yr Dec.: 1.67[1] mas/yr |
| Parallax (π) | 0.52 ± 0.17[1] mas |
| Distance | 8.9k ly (2.7k[4] pc) |
| Absolute magnitude (MV) | −9.0[4] |
| Details | |
| Mass | 20[4] M☉ |
| Radius | 700[4] R☉ |
| Luminosity | 316,000[4] L☉ |
| Surface gravity (log g) | 0.70[6] cgs |
| Temperature | 5,200[4] K |
| Metallicity | 0.38[6] |
| Other designations | |
| Database references | |
| SIMBAD | data |
V382 Carinae
V382 Carinae, also known as x Carinae (x Car), is a yellow hypergiant in the constellation Carina.
V382 Car is a G-type star with a mean apparent magnitude of +3.93, a variable star of low amplitude. The General Catalogue of Variable Stars lists it as a possible Delta Cephei variable, but that is unlikely.[3] A period of 556 days has been suggested, but it is not entirely regular.[7] It is 8,900 light years from Earth and 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.[4][8]
References
- 1 2 3 4 5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode:2002yCat.2237....0D.
- 1 2 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.
- 1 2 3 4 5 6 7 8 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.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137.
- ↑ Van Leeuwen, F.; Van Genderen, A. M.; Zegelaar, I. (1998). "Hipparcos photometry of 24 variable massive stars (α Cygni variables)". Astronomy and Astrophysics Supplement Series 128: 117. Bibcode:1998A&AS..128..117V. doi:10.1051/aas:1998129.
- ↑ 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.
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