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HD 278555 b
Orbiting HD 278555, discovered in 2026 (7531) by Transiting Exoplanet Survey Satellite (TESS) via the Transit method.
Planet
| Radius | 11.03 R⊕ |
| Mass | 266.98 M⊕ |
| Orbital period | 28.84 Earth days (~0.1 Earth years) |
| Orbital eccentricity | 0.085 |
| Equilibrium temperature | 853 K (580 °C) |
Host star — HD 278555
| Temperature | 6047 K (5774 °C) |
| Radius | 1.62 R☉ |
| Mass | 1.25 M☉ |
Location
| Distance from Earth | 289.8 pc (~945 light-years) |
| Right ascension / Declination | 50.3680 / 32.9138 |
Last refreshed 2026-09-13 from NASA's Exoplanet Archive.