 An artist's impression of the exoplanet HIP 11915 b. | |
| Discovery | |
|---|---|
| Discovered by | Meléndez et al. |
| Discovery site | La Silla Observatory, Chile |
| Discovery date | July 2015[1] |
| HARPS | |
| Orbital characteristics | |
| 4.8±0.1 AU[2] | |
| Eccentricity | 0.1±0.07[2] |
| 3830±150 days[2] (10.49±0.41 years) | |
| Star | HIP 11915 |
| Physical characteristics | |
| ~1[3] RJ | |
| Mass | 0.99±0.06 MJ[2] |
| Temperature | 118 K (−155 °C; −247 °F) |
HIP 11915 b is an exoplanet orbiting the solar twin star HIP 11915 about 190 light-years (57 parsecs, or nearly 1.798×1015 km) from Earth in the constellation Cetus. It is notable as the first exoplanet to be discovered with an orbit and mass similar to that of Jupiter (essentially, a "Jupiter analog"), suggesting that its system may be similar to that of the Solar System.[1] It orbits its star at a distance of approximately 4.8 AU.[4] The exoplanet was found by using the radial velocity method, where periodic Doppler shifts of spectral lines of the host star suggest an orbiting object.
- ^ a b "Jupiter Twin Discovered Around Solar Twin". Retrieved 16 July 2015.
- ^ a b c d Bedell, M.; Melendez, J.; Bean, J. L.; Ramirez, I.; Asplund, M.; Alves-Brito, A.; Casagrande, L.; Dreizler, S.; Monroe, T.; Spina, L.; Maia, M. Tucci (July 14, 2015). "The Solar Twin Planet Search II. A Jupiter twin around a solar twin". Astronomy & Astrophysics. 581: A34. arXiv:1507.03998. doi:10.1051/0004-6361/201525748. ISSN 0004-6361.
- ^ "Discovery of Jupiter's twin points to Solar System 2". The Daily Telegraph. 20 July 2015. Retrieved 13 July 2016.
- ^ "Planet HIP 11915". Extrasolar Planets Encyclopaedia. Archived from the original on 26 January 2020. Retrieved 17 July 2015.