TRAPPIST-1c

TRAPPIST-1c
Artist's impression of TRAPPIST-1c (June 2023) with TRAPPIST-1b in the background
Discovery[1]
Discovered byMichaël Gillon et al.
Discovery siteTRAPPIST
Discovery dateMay 2, 2016
Transit
Orbital characteristics[2]
0.01580±0.00013 AU
Eccentricity0.00654±0.00188[3]
2.421937±0.000018 d
Inclination89.778°±0.118°
282.45°±17.10°[3]
StarTRAPPIST-1[4]
Physical characteristics[2]
1.097+0.014
−0.012 R🜨
Mass1.308±0.056 M🜨
Mean density
5.447+0.222
−0.235 g/cm3
1.086±0.043 g
10.65±0.42 m/s2
Temperature339.7±3.3 K (66.6 °C; 151.8 °F, equilibrium)[5]
380±31 K (107 °C; 224 °F, surface)[6]
Atmosphere
Composition by volumeNone or extremely thin[6][7][8]

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]

  1. ^ Cite error: The named reference Gillon2016 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Agol2021 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Grimm2018 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference vangrootel2017 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Ducrot2020 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Zieba2023 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference JWST-20230619 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Radica2024 was invoked but never defined (see the help page).