| WASP-3b | |
| Discoverer: | Pollacco et al. (SuperWASP) |
| Discovery Site: | ORM |
| Discovered: | October 31, 2007 |
| Discovery Method: | Transit |
| Apsis: | astron |
| Semimajor: | 0.0317 AU |
| Eccentricity: | 0 |
| Period: | 1.8468372 ± 6e-07 d |
| Inclination: | 85.06 |
| Mean Radius: | 1.454 ± 0.084 |
| Mass: | 2.06 ± 0.13 |
WASP-3b is an extrasolar planet orbiting the star WASP-3 located approximately 800 light-years away in the constellation Lyra. It was discovered via the transit method by SuperWASP, and follow up radial velocity observations confirmed that WASP-3b is a planet. The planet's mass and radius indicate that it is a gas giant with a similar bulk composition to Jupiter. WASP-3b has such an orbital distance around its star to classify it in the class of planets known as hot Jupiters and has an atmospheric temperature of approximately 1983 K.
WASP-3b undergoes no detectable gravitational tugging from other bodies in this system.[1]
The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is probably aligned with the equatorial plane of the star, misalignment equal to 3.3°.