HIP 41378 f

HIP 41378 f (also known as EPIC 211311380 f) is an exoplanet orbiting around the F-type star HIP 41378. 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][3] Located within the habitable zone of its parent star, HIP 41378 f may harbor a habitable exomoon.

HIP 41378 f

Discovery
Discovery date	June 2016
Detection method	Transit
Orbital characteristics
Semi-major axis	1.37±0.02 au
Orbital period	542.07975±0.00014
Star	HIP 41378[1]
Physical characteristics
Mean radius	9.2±0.1 R⊕
Mass	12±3 M⊕

References

1. "HIP 41378 f CONFIRMED PLANET OVERVIEW PAGE". NASA Exoplanet Archive. Retrieved 2016-07-08.
2. Santerne, A.; Malavolta, L.; Kosiarek, M. R.; Dai, F.; Dressing, C. D.; Dumusque, X.; Hara, N. C.; Lopez, T. A.; Mortier, A.; Vanderburg, A.; Adibekyan, V.; Armstrong, D. J.; Barrado, D.; Barros, S. C. C.; Bayliss, D.; Berardo, D.; Boisse, I.; Bonomo, A. S.; Bouchy, F.; Brown, D. J. A.; Buchhave, L. A.; Butler, R. P.; Collier Cameron, A.; Cosentino, R.; Crane, J. D.; Crossfield, I. J. M.; Damasso, M.; Deleuil, M. R.; Delgado Mena, E.; et al. (2019). "An extremely low-density and temperate giant exoplanet". arXiv:1911.07355 [astro-ph.EP].
3. Akinsanmi, B.; Santos, N. C.; Faria, J. P.; Oshagh, M.; Barros, S. C. C.; Santerne, A.; Charnoz, S. (2020-03-01). "Can planetary rings explain the extremely low density of HIP 41378 𝑓?". Astronomy & Astrophysics. 635: L8. doi:10.1051/0004-6361/202037618. ISSN 0004-6361.