V528 Carinae Explained

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

V528 Carinae has an apparent visual magnitude that varies between about 6.3 and 6.8. It is a distant star but the exact distance is uncertain. The Hipparcos satellite gives a negative annual parallax and is not helpful,^[1] while the Gaia Data Release 3 parallax of implies a distance of around (2,200 parsecs). Assuming membership of the Carina OB2 membership would give a distance of about .^[2]

V528 Carinae is a red supergiant of spectral type M2 Ib with an effective temperature of . It has a radius of 700 solar radii. In the visible spectrum, its luminosity is 11,900 times higher than the Sun,^[3] but the bolometric luminosity considering all wavelengths reaches around . It loses mass at per year.^[4]

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

See also

• List of largest known stars

Notes and References

1. 2007A&A...474..653V. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 474. 2. 653–664. Van Leeuwen. F.. 2007. 10.1051/0004-6361:20078357. 0708.1752 . 18759600.
2. 2006.14649. 10.1007/s10509-020-03827-0. Distance scale for high-luminosity stars in OB associations and in field with Gaia DR2. Spurious systematic motions. 2020. Melnik. A. M.. Dambis. A. K.. Astrophysics and Space Science. 365. 7. 112. 2020Ap&SS.365..112M. 220128144.
3. 2019AJ....158...20M . A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2 . Messineo . M. . Brown . A. G. A. . The Astronomical Journal . 2019 . 158 . 1 . 20 . 10.3847/1538-3881/ab1cbd . 1905.03744 . 148571616 . free .
4. Observational investigation of mass loss of M supergiants. 2000. Astronomy and Astrophysics. 357. 225. 2000A&A...357..225J. Josselin. E.. Blommaert. J. A. D. L.. Groenewegen. M. A. T.. Omont. A.. Li. F. L..