V528 Carinae

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V528 Carinae
Carina constellation map.svg
Location of V528 Car
Observation data
Epoch J2000      Equinox J2000
Constellation Carina
Right ascension 11h 03m 06.15s[1]
Declination 60° 54′ 38.6″[1]
Apparent magnitude (V) +6.75[2]
Spectral type M2 Ib[3][4]
B−V color index +2.04[2]
Variable type Lc[5]
Proper motion (μ) RA: −7.26[2] mas/yr
Dec.: +0.42[2] mas/yr
Parallax (π)−0.69 ± 0.45[1] mas
Distance3,850[6] ly
Absolute magnitude (MV)−6.09[2]
Radius700[2] R
Diameter700[2] D
Luminosity81,000[2] L
Surface gravity (log g)0.0[2] cgs
Temperature3,700[2] K
Other designations
V528 Car, CD−60° 3327, HD 95950, HIP 54021, 2MASS J11030616-6054387, IRAS 11010-6038, WISE J110305.99-605438.7, SAO 251235
Database references

V528 Carinae (V528 Car, HD 95950, HIP 54021) is a variable star in the constellation Carina.

V528 Carinae has an apparent visual magnitude of +6.75. It is a distant star but the exact distance is uncertain. The Hipparcos satellite gives a negative annual parallax and is not helpful. Its Carina OB2 membership allows the distance to be estimated at 3,850 light-years.[6]

V528 Carinae is a red supergiant of spectral type M2 Ib with an effective temperature of 3,700 K. It has a radius of 700 solar radii, making it one of the largest stars. In the visible spectrum luminosity is 11,900 times higher than the sun, but the bolometric luminosity considering all wavelengths reaches 81,000 L.[2] It loses mass at 0.5×10−9 M per year.[6]

It is classified as a slow irregular variable whose prototype is TZ Cassiopeiae.[5]

See also[edit]


  1. 1.0 1.1 1.2 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.
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 Levesque, Emily M.; Massey, Philip; Olsen, K. A. G.; Plez, Bertrand; Josselin, Eric; Maeder, Andre; Meynet, Georges (August 2005). "The Effective Temperature Scale of Galactic Red Supergiants: Cool, but Not As Cool As We Thought". The Astrophysical Journal 628 (2): 973–985. arXiv:astro-ph/0504337. Bibcode 2005ApJ...628..973L. doi:10.1086/430901.
  3. Humphreys, Roberta M.; Strecker, Donald W.; Ney, E. P. (1972). "Spectroscopic and Photometric Observations of M Supergiants in Carina". Astrophysical Journal 172: 75. Bibcode 1972ApJ...172...75H. doi:10.1086/151329.
  4. Malyuto, V.; Oestreicher, M. O.; Schmidt-Kaler, Th. (1997). "Quantitative spectral classification of galactic disc K-M stars from spectrophotometric measurements". Monthly Notices of the Royal Astronomical Society 286 (2): 500. Bibcode 1997MNRAS.286..500M. doi:10.1093/mnras/286.2.500.
  5. 5.0 5.1 Samus, N. N.Expression error: Unrecognized word "etal". (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.
  6. 6.0 6.1 6.2 Josselin, E.; Blommaert, J. A. D. L.; Groenewegen, M. A. T.; Omont, A.; Li, F. L. (2000). "Observational investigation of mass loss of M supergiants". Astronomy and Astrophysics 357: 225. Bibcode 2000A&A...357..225J.

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