K2-157 d
| Discovery[1] | |
|---|---|
| Discovered by | Castro-González et al |
| Discovery date | 2025 |
| Radial velocity | |
| Orbital characteristics | |
| 0.3090 AU | |
| Eccentricity | <0.5 |
| 66.50 d | |
| Star | K2-157 |
| Physical characteristics | |
| Mass | 23.3 ± 2.5 Earth masses |
K2-157 d is a Neptunian exoplanet in orbit around the G-type star K2-157.[1]
Astronomers found the planet in 2025 using radial velocity data gathered by the ESPRESSO spectrograph on the Very Large Telescope.[2]
It holds a minimum mass of 23.3 Earth masses and completes one orbit every 66.5 days at a distance of 0.309 astronomical units from its host star.[3][1]
References
- ^ a b c "K2-157 d". NASA Exoplanet Catalog. Retrieved March 11, 2026.
- ^ Castro-González, A.; Bouchy, F.; Correia, A. C. M.; Sozzetti, A.; Lillo-Box, J.; Figueira, P.; Lavie, B.; Lovis, C.; Hobson, M. J.; Sousa, S. G.; Adibekyan, V.; Standing, M. R.; Hara, N. C.; Barrado, D.; Silva, A. M. (2025-07-01). "Two neighbours of the ultra-short-period Earth-sized planet K2-157 b in the warm Neptunian savanna". Astronomy & Astrophysics. 699: A344. doi:10.1051/0004-6361/202554736. ISSN 0004-6361.
- ^ "K2-157 Overview". NASA Exoplanet Archive (Caltech/IPAC). Retrieved March 11, 2026.