Kepler-12b
| Discovery | |
|---|---|
| Discovered by | Fortney et al. |
| Discovery site | Kepler spacecraft |
| Discovery date | Published September 5, 2011 |
| radial velocity/transit | |
| Orbital characteristics | |
| 0.0556 (± 0.0007) AU | |
| Eccentricity | 0.01 |
| 4.4379637 (± 0.0007) d | |
| Inclination | 88.76 (±0.08) |
| Star | Kepler-12 |
| Physical characteristics | |
| 1.695 +0.028 −0.032 RJ | |
| Mass | 0.431 (± 0.041) MJ |
Mean density | 0.111 +0.011 −0.009 g cm−3 |
| Temperature | 1711±223 K. |
Kepler-12b is a hot Jupiter that orbits G-type star Kepler-12 some 900 parsecs (2,900 ly) away. The planet has an anomalously large radius that could not be explained by standard models at the time of its discovery, almost 1.7 times Jupiter's size while being 0.4 times Jupiter's mass. The planet was detected by the Kepler spacecraft, a NASA project searching for planets that transit (cross in front of) their host stars. The discovery paper was published on September 5, 2011.