TRAPPIST-1c
Rocky exoplanet orbiting TRAPPIST-1 / From Wikipedia, the free encyclopedia
TRAPPIST-1c, also designated as 2MASS J23062928-0502285 c, is a mainly rocky exoplanet orbiting around the ultracool dwarf star TRAPPIST-1, located 40.7 light-years (12.5 parsecs) away from Earth in the constellation Aquarius. It is the third most massive and third largest planet of the system, with about 131% the mass and 110% the radius of Earth.[2] Its density indicates a primarily rocky composition, and observations by the James Webb Space Telescope announced in 2023 suggests against a thick CO2 atmosphere, however this does not exclude a thick abiotic oxygen-dominated atmosphere as is hypothesized to be common around red dwarf stars.[citation needed]
Quick Facts Discovery, Discovered by ...
Discovery[1] | |
---|---|
Discovered by | Michaël Gillon et al. |
Discovery site | TRAPPIST |
Discovery date | May 2, 2016 |
Transit | |
Orbital characteristics[2] | |
0.01580±0.00013 AU | |
Eccentricity | 0.00654±0.00188[3] |
2.421937±0.000018 d | |
Inclination | 89.778°±0.118° |
282.45°±17.10°[3] | |
Star | TRAPPIST-1[4] |
Physical characteristics[2] | |
Mean radius | 1.097+0.014 −0.012 R🜨 |
Mass | 1.308±0.056 M🜨 |
Mean density | 5.447+0.222 −0.235 g/cm3 |
1.086±0.043 g 10.65±0.42 m/s2 | |
Temperature | 339.7±3.3 K (66.6 °C; 151.8 °F, equilibrium)[5] 380±31 K (107 °C; 224 °F, surface)[6] |
Atmosphere | |
Composition by volume | None or extremely thin[7][6] |
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