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HD 28109 d
Orbiting HD 28109, discovered in 2022 (7527) by Transiting Exoplanet Survey Satellite (TESS) via the Transit method.
Planet
| Radius | 3.11 R⊕ |
| Mass | 5.80 M⊕ |
| Orbital period | 84.29 Earth days (~0.2 Earth years) |
| Orbital eccentricity | 0.005 |
| Equilibrium temperature | 561 K (288 °C) |
Host star — HD 28109
| Temperature | 6189 K (5916 °C) |
| Radius | 1.43 R☉ |
| Mass | 1.23 M☉ |
Location
| Distance from Earth | 139.6 pc (~455 light-years) |
| Right ascension / Declination | 65.2383 / -68.1027 |
Last refreshed 2026-09-13 from NASA's Exoplanet Archive.