Discovery | |
---|---|
Discovered by | West et al. (
SuperWASP) Bakos et al. ( HATNet) |
Discovery site | SAAO |
Discovery date | April 1, 2008 (announced) September 26, 2008 (preprints) |
Transit | |
Orbital characteristics | |
0.0439+0.0006 −0.0009 [1] AU | |
Eccentricity | 0 [1] |
3.7224690 ± 0.0000067 [1] d | |
Inclination | 88.5 ± 0.6 [1] |
Semi-amplitude | 69.1 ± 3.5 [1] |
Star | WASP-11/HAT-P-10 [2] |
Physical characteristics | |
Mean radius | 1.045+0.050 −0.033 [1] RJ |
Mass | 0.460 ± 0.028 [1] MJ |
Mean
density | 498 ± 64 kg/m3 (839 ± 108 lb/cu yd) [1] |
10.5 m/s2 (34 ft/s2) [1] | |
Temperature | 1030+26 −19 [1] [note 1] |
WASP-11b/HAT-P-10b or WASP-11Ab/HAT-P-10Ab [3] 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. [4] On 26 September 2008, the HATNet Project's paper describing the planet which they designated HAT-P-10b appeared on the arXiv preprint server. [1] 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. [2]
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. [5] An alternative classification system for hot Jupiters is based on the equilibrium temperature and the planet's Safronov number. [note 2] 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 [note 1] 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. [1]
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. [7]
Media related to WASP-11b/HAT-P-10b at Wikimedia Commons
Discovery | |
---|---|
Discovered by | West et al. (
SuperWASP) Bakos et al. ( HATNet) |
Discovery site | SAAO |
Discovery date | April 1, 2008 (announced) September 26, 2008 (preprints) |
Transit | |
Orbital characteristics | |
0.0439+0.0006 −0.0009 [1] AU | |
Eccentricity | 0 [1] |
3.7224690 ± 0.0000067 [1] d | |
Inclination | 88.5 ± 0.6 [1] |
Semi-amplitude | 69.1 ± 3.5 [1] |
Star | WASP-11/HAT-P-10 [2] |
Physical characteristics | |
Mean radius | 1.045+0.050 −0.033 [1] RJ |
Mass | 0.460 ± 0.028 [1] MJ |
Mean
density | 498 ± 64 kg/m3 (839 ± 108 lb/cu yd) [1] |
10.5 m/s2 (34 ft/s2) [1] | |
Temperature | 1030+26 −19 [1] [note 1] |
WASP-11b/HAT-P-10b or WASP-11Ab/HAT-P-10Ab [3] 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. [4] On 26 September 2008, the HATNet Project's paper describing the planet which they designated HAT-P-10b appeared on the arXiv preprint server. [1] 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. [2]
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. [5] An alternative classification system for hot Jupiters is based on the equilibrium temperature and the planet's Safronov number. [note 2] 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 [note 1] 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. [1]
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. [7]
Media related to WASP-11b/HAT-P-10b at Wikimedia Commons