V3903 Sagittarii
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 15h 15m 11.35199s [1] |
| Declination | +04° 56′ 21.7099″ [1] |
| Spectral type | O7V+O9V |
V3903 Sagittarii is an Algol variable star system[2] in the constellation Sagittiarus. Its apparent magnitude is 7.31. Located around 459 parsecs (1,500 ly) distant,[1] the system consists of two hot O-type main-sequence stars of spectral types O7V and O9V.[2] Due to the eclipses, the system varies by 0.16 magnitudes in the V-band with a period of approximately 1.74 days.[3] John Flamsteed gave this star the Flamsteed designation 11 Sagittarii, although for some reason this designation is now more often used to refer to the star he designated 1 Sagittarii.[4]
References
- 1 2 3 "HD 265921". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 3 August 2014.
- 1 2 Weidner, C. (2010). "The masses, and the mass discrepancy of O-type stars". Astronomy & Astrophysics 524: A98. arXiv:1010.2204. Bibcode:2010A&A...524A..98W. doi:10.1051/0004-6361/201014491.
- ↑ Morrison, N. D. (1987). "The O-type spectroscopic binary system HD 165921.". Publications of the Astronomical Society of the Pacific 99: 1149. Bibcode:1987PASP...99.1149M. doi:10.1086/132095.
- ↑ Wagman, M. (August 1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy 18 (3): 209, 212. Bibcode:1987JHA....18..209W. doi:10.1177/002182868701800305.
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