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HD 17156 b
Orbiting HD 17156, discovered in 2007 (7512) by Subaru Telescope via the Radial Velocity method.
Planet
| Radius | 12.26 R⊕ |
| Mass | 1036.12 M⊕ |
| Orbital period | 21.22 Earth days (~0.1 Earth years) |
| Orbital eccentricity | 0.677 |
| Equilibrium temperature | 888 K (615 °C) |
Host star — HD 17156
| Temperature | 6046 K (5773 °C) |
| Radius | 1.52 R☉ |
| Mass | 1.28 M☉ |
Location
| Distance from Earth | 78.1 pc (~255 light-years) |
| Right ascension / Declination | 42.4366 / 71.7531 |
Last refreshed 2026-09-14 from NASA's Exoplanet Archive.