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.