Exoplanet CatalogExoplanet HAT-P-21 b
Radius12.44 R⊕Earth = 1
Mass1,547.8 M⊕Earth = 1
Orbital period4.12 d
Equilibrium temp.1,367 K≈ 1,094 °C
Distance904.4 ly
Discovered2010Transit
Size compared (radius, Earth = 1)
1.00
3.88
11.21
12.44
Where it sits among all planets (percentile)
79%
92%
24%
86%
44%
Share of planets with a smaller value (of 6,445 planets, where known).
Planets of HAT-P-21 (1)
| Planet | Period (d) | Radius (R⊕) | Mass (M⊕) | Eq. temp K | Year |
|---|---|---|---|---|---|
| HAT-P-21 b | 4.12 | 12.44 | 1,547.8 | 1,367 | 2010 |
| Host star | Spectral type | Teff K | Radius (R☉) | Mass (M☉) |
|---|---|---|---|---|
| HAT-P-21 | G3 | 5,588 | 1.21 | 1.24 |
Values are NASA Exoplanet Archive estimates and may change. Equilibrium temperature is a theoretical value ignoring any atmosphere.