We report the discovery from the WASP survey of two exoplanetary systems , each consisting of a Jupiter-sized planet transiting an 11th magnitude ( V ) main-sequence star .
WASP-104b orbits its star in 1.75 d , whereas WASP-106b has the fourth-longest orbital period of any planet discovered by means of transits observed from the ground , orbiting every 9.29 d. Each planet is more massive than Jupiter ( WASP-104b has a mass of 1.27 \pm 0.05 M _ { Jup } , while WASP-106b has a mass of 1.93 \pm 0.08 M _ { Jup } ) .
Both planets are just slightly larger than Jupiter , with radii of 1.14 \pm 0.04 and 1.09 \pm 0.04 R _ { Jup } for WASP-104 and WASP-106 respectively .
No significant orbital eccentricity is detected in either system , and while this is not surprising in the case of the short-period WASP-104b , it is interesting in the case of WASP-106b , because many otherwise similar planets are known to have eccentric orbits .