| Discovery | |
|---|---|
| Discovered by | Fischer et al. |
| Discovery date | 28 December 2011 |
| radial velocity | |
| Orbital characteristics | |
| 1.01 AU (151,000,000 km) | |
| Eccentricity | 0.27 (± 0.05)[1] |
| 413.7 (± 8.5)[1] d | |
| Star | HIP 57274 |
| Physical characteristics | |
| ~9 R🜨 | |
| Mass | 0.527 (± 0.025)[1] MJ (167.5 ME) |
| Temperature | 167 K (−106 °C; −159 °F)[2] |
HIP 57274 d is an exoplanet orbiting the K-type main sequence star HIP 57274 about 84.5 light-years (26 parsecs, or nearly 8.022×1016 km) from Earth in the constellation Cetus. It orbits within the outer part of its star's habitable zone, at a distance of 1.01 AU. The exoplanet was found by using the radial velocity method, from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star.