Epoch J2000.0 Equinox J2000.0 (ICRS)
|Right ascension||15h 15m 11.35199s |
|Declination||+04° 56′ 21.7099″ |
V3903 Sagittarii is an Algol variable star system in the constellation Sagittiarus. Its apparent magnitude is 7.31. Located around 459 parsecs (1,500 ly) distant, the system consists of two hot O-type main-sequence stars of spectral types O7V and O9V. Due to the eclipses, the system varies by 0.16 magnitudes in the V-band with a period of approximately 1.74 days. 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.
- "HD 265921". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 3 August 2014.
- Weidner, C. (2010). "The masses, and the mass discrepancy of O-type stars". Astronomy 524: A98. 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. 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.
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