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HD 99109 b
Orbiting HD 99109, discovered in 2005 (7510) by W. M. Keck Observatory via the Radial Velocity method.
Planet
| Radius | Unknown |
| Mass | 139.85 M⊕ |
| Orbital period | 439.30 Earth days (~1.2 Earth years) |
| Orbital eccentricity | 0.090 |
| Equilibrium temperature | Unknown |
Host star — HD 99109
| Temperature | 5282 K (5009 °C) |
| Radius | 0.98 R☉ |
| Mass | 0.76 M☉ |
Location
| Distance from Earth | 54.8 pc (~179 light-years) |
| Right ascension / Declination | 171.0716 / -1.5298 |
Last refreshed 2026-09-14 from NASA's Exoplanet Archive.