HIP 41378 f (also known as EPIC 211311380 f) is an exoplanet orbiting around the F-type star HIP 41378. It is the outermost planet of its system. It has an anomalously large radius (9.2 R🜨) for a planet of its size and temperature, therefore the radius may actually be that of an optically thick ring system.[2] It is located within the optimistic habitable zone of its parent star.[3] No atmospheric signatures were found as in 2022, further reinforcing the hypothesis of opaque circumplanetary rings.[4]
Discovery | |
---|---|
Discovery date | June 2016 |
Transit | |
Orbital characteristics | |
1.37±0.02 au | |
542.07975±0.00014 | |
Star | HIP 41378[1] |
Physical characteristics | |
Mean radius | 9.2 ± 0.1 R🜨 |
Mass | 12 ± 3 ME |
Mean density | 0.09 ± 0.02 g cm−3 |
Temperature | Teq: 294 K (21 °C; 70 °F) |