V373 Cassiopeiae

V373 Cas

Observation data Epoch J2000      Equinox J2000
Constellation	Cassiopeia
Right ascension	23^h 55^m 33.839^s[1]
Declination	+57° 24′ 43.81″[1]
Apparent magnitude (V)	6.045
Characteristics
Spectral type	B0.5II + B4III
Astrometry
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
SIMBAD	data

V373 Cas is a spectroscopic 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]

References

1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. 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.