WASP-3

WASP-3 is a triple star system located about away from the Sun in the constellation Lyra. The system has an apparent magnitude of 10. The brightest and most massive star of this system is WASP-3A, an F-type main sequence star which has one known transiting hot Jupiter exoplanet, WASP-3b. Since the planet transits the star, the star is classified as a planetary transit variable and has received the variable star designation V838 Lyrae.

== Triple system == WASP-3 has been identified as a triple star system in a 2019 study of astrometry from the Gaia mission. The brightest and most massive component of the system is WASP-3A, an F-type main sequence star that is 1.24 times as massive as the Sun and 1.31 times as large as the Sun in radius. WASP-3A appears to be a variable star; observations between 2007 and 2010 show that the star's chromospheric activity had increased during that time period. The second companion, WASP-3B, is a low-mass star about 0.11 times as massive as the Sun and has an effective temperature of about . WASP-3B is separated eastward from WASP-3A at an angular separation of approximately 1.19 arcseconds, corresponding to a projected separation distance of about . WASP-3B was first identified in observations from 2012 to 2013. The third companion, WASP-3C, is much more distant with an angular separation of approximately 18.3 arcseconds from WASP-3A, corresponding to a projected separation distance of . WASP-3C is about 0.77 times as massive as the Sun and has an effective temperature of about .