V373 Cassiopeiae

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V373 Cas
Observation data
Epoch J2000      Equinox J2000
Constellation Cassiopeia
Right ascension 23h 55m 33.839s[1]
Declination +57° 24′ 43.81″[1]
Apparent magnitude (V) 6.045
Spectral type B0.5II + B4III
Radial velocity (Rv) −25.5 ± 0.9 km/s
Proper motion (μ) RA: −3.49 ± 0.33[1] mas/yr
Dec.: −0.10 ± 0.24[1] mas/yr
Parallax (π) 0.17 ± 0.32[1] mas
Other designations
HR 9052, BD +56° 3115, HD 224151, SAO 35899, HIP 117957.
Database references

V373 Cas is an eclipsing binary in the constellation Cassiopeia. It is composed of two hot blue-white giant stars that have exhausted their core hydrogen and expanded off the main sequence. Lyubimkov and colleagues analysed spectral and radial velocity to calculate that the stars were 18.6 ± 2.4 and 14.2 ± 1.9 times as massive as the Sun and the age of the system at around 7-8 million years old.[2]


  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ Lyubimkov, L. S.; Rachkovskaya, T. M.; Rostopchin, S. I.; Tarasov, A. E. (1998). "The binary system V373 Cas: orbital elements, parameters of the components, and helium abundance". Astronomy Reports. 42 (3): 312–321. Bibcode:1998ARep...42..312L.