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Kepler-21 b
Orbiting Kepler-21, discovered in 2012 (7517) by Kepler via the Transit method.
Planet
| Radius | 1.64 R⊕ |
| Mass | 7.50 M⊕ |
| Orbital period | 2.79 Earth days (~0.0 Earth years) |
| Orbital eccentricity | 0.000 |
| Equilibrium temperature | 2015 K (1742 °C) |
Host star — Kepler-21
| Temperature | 6305 K (6032 °C) |
| Radius | 1.90 R☉ |
| Mass | 1.41 M☉ |
Location
| Distance from Earth | 108.5 pc (~354 light-years) |
| Right ascension / Declination | 287.3620 / 38.7141 |
Last refreshed 2026-09-14 from NASA's Exoplanet Archive.