| WASP-11b/HAT-P-10b | |
| Discoverer: | West et al. (SuperWASP) Bakos et al. (HATNet) |
| Discovery Site: | SAAO |
| Discovered: | April 1, 2008 (announced) September 26, 2008 (preprints) |
| Discovery Method: | Transit |
| Apsis: | astron |
| Semimajor: | 0.0439 AU |
| Eccentricity: | 0 |
| Period: | 3.7224690 ± 0.0000067 d |
| Inclination: | 88.5 ± 0.6 |
| Semi-Amplitude: | 69.1 ± 3.5 |
| Mean Radius: | 1.045 |
| Mass: | 0.460 ± 0.028 |
| Surface Grav: | 10.5m/s2 |
| Single Temperature: | 1030 |
| Note: | surpress |
WASP-11b/HAT-P-10b or WASP-11Ab/HAT-P-10Ab[1] is an extrasolar planet discovered in 2008. The discovery was announced (under the designation WASP-11b) by press release by the SuperWASP project in April 2008 along with planets WASP-6b through to WASP-15b, however at this stage more data was needed to confirm the parameters of the planets and the coordinates were not given.[2] On 26 September 2008, the HATNet Project's paper describing the planet which they designated HAT-P-10b appeared on the arXiv preprint server. The SuperWASP team's paper appeared as a preprint on the Extrasolar Planets Encyclopaedia on the same day, confirming that the two objects (WASP-11b and HAT-P-10b) were in fact the same, and the teams agreed to use the combined designation.[3]
The planet had the third lowest insolation of the known transiting planets at the time of the discovery (prior to this, Gliese 436 b and HD 17156 b were known to have lower insolation). The temperature implies it falls into the pL class of hot Jupiters: planets which lack significant quantities of titanium(II) oxide and vanadium(II) oxide in their atmospheres and do not have temperature inversions.[4] An alternative classification system for hot Jupiters is based on the equilibrium temperature and the planet's Safronov number.[5] In this scheme, for a given temperature, class I planets have high Safronov numbers and tend to be in orbit around cooler host stars, while class II planets have lower Safronov numbers.[6] In the case of WASP-11b/HAT-P-10b, the equilibrium temperature is 1030 K[7] and the Safronov number is 0.047±0.003, which means it is located close to the dividing line between the class I and class II planets.
The planet is in a binary star system, the second star is WASP-11 B, with a mass 0.34 ± 0.05 of the Sun and a temperature of 3483 ± 43 K.[8]
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