About this system
The innermost, TRAPPIST-1 b, circles it in 1.51 days; the outermost, TRAPPIST-1 h, in 18.8 days. 4 of them lie in the habitable zone: TRAPPIST-1 d, TRAPPIST-1 e, TRAPPIST-1 f and TRAPPIST-1 g.
Worlds of TRAPPIST-1
| Name | Type | Size | A year | Temperature |
|---|---|---|---|---|
| TRAPPIST-1 b | Earth-sized | 1.1 × Earth | 1.51 days | 398 K |
| TRAPPIST-1 c | Earth-sized | 1.1 × Earth | 2.42 days | 340 K |
| TRAPPIST-1 d | Earth-sized | 0.79 × Earth | 4.05 days | 286 K |
| TRAPPIST-1 e | Earth-sized | 0.92 × Earth | 6.1 days | 250 K |
| TRAPPIST-1 f | Earth-sized | 1 × Earth | 9.21 days | 218 K |
| TRAPPIST-1 g | Earth-sized | 1.1 × Earth | 12.4 days | 197 K |
| TRAPPIST-1 h | Earth-sized | 0.76 × Earth | 18.8 days | 172 K |