HAT-P-12b
 Size comparison of HAT-P-12b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Hartman et al. |
| Discovery site | Cambridge, Massachusetts |
| Discovery date | April 29, 2009 |
| Transit | |
| Orbital characteristics | |
| 0.0384 ± 0.0003 AU (5,745,000 ± 45,000 km)[1] | |
| Eccentricity | 0 (assumed)[1] |
| 3.2130598 ± 0.0000021[1] d | |
| Inclination | 89.0 ± 0.4[1] |
| Star | HAT-P-12 |
| Physical characteristics | |
Mean radius | 0.959 ± 0.029[1] RJ |
| Mass | 0.211 ± 0.012[1] MJ |
Mean density | 295 ± 25 kg/m3 (497 ± 42 lb/cu yd)[1] |
HAT-P-12b is an extrasolar planet approximately 468 light years away from Earth, orbiting the 13th magnitude K-type star HAT-P-12, which is located in Canes Venatici constellation. It is a transiting hot Jupiter that was discovered by the HATNet Project on April 29, 2009.
HAT-P-12b is a H/He-dominated gas giant planet with a core mass of 11.3+2.6
−2.1 M