25 Serpentis

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25 Serpentis

Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Serpens
Right ascension 15h 46m 05.63636s[1]
Declination −01° 48′ 15.0830″[1]
Apparent magnitude (V) 5.39
Other designations

25 Serpentis is a binary star in the constellation Serpens.[1] It is a spectroscopic binary[2] consisting of a hot B-type giant and an A-type main-sequence star. The primary is a Slowly pulsating B star, which causes the system to vary by 0.03 magnitudes.[3]


  1. ^ a b c "25 Serpentis -- Spectroscopic binary". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 2 July 2014. 
  2. ^ Petrie, R. M.; Phibbs, E. (1950). "Redetermination of the spectrographic orbits of iot Peg and 25 Ser.". Publications of the Dominion Astrophysical Observatory Victoria 8: 225. Bibcode:1950PDAO....8..225P. 
  3. ^ VSX; Otero, S. A (10 February 2012). "PT Serpentis". AAVSO Website. American Association of Variable Star Observers. Retrieved 28 May 2014.