WASP-7b
WASP-7b is an extrasolar planet discovered in 2008. This 5-day period planet is slightly smaller than Jupiter, roughly the same mass and more dense.
Size comparison of WASP-7b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Cameron et al. (SuperWASP) |
| Discovery site | SAAO |
| Discovery date | April 1, 2008 |
| Transit | |
| Orbital characteristics | |
| 0.0618+0.0014 −0.0033 AU | |
| Eccentricity | 0.0173+0.0009 −0.0011 |
| 4.954658+5.5e-5 −4.3e-5 d | |
| Inclination | 89.6+0.4 −0.9 |
| Star | WASP-7 |
| Physical characteristics | |
Mean radius | 0.915+0.046 −0.04 RJ |
| Mass | 0.96+0.12 −0.18 MJ |
Mean density | 1,660 kg/m3 (2,800 lb/cu yd) |
| 3.03 g | |
| Temperature | 1393+80 −82 K |
A study in 2012, utilizing the Rossiter–McLaughlin effect, determined the planetary orbit is strongly misaligned with the equatorial plane of the star, with misalignment equal to 86±8°, making the planetary orbit nearly polar. The orbit is also slightly eccentric, which is surprising given the tidal circularization timescale of below 650 million years.
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