TRAPPIST-1 c
Sign in to saveTRAPPIST-1c is a mainly rocky exoplanet orbiting around the ultracool dwarf star TRAPPIST-1, located 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. 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.
Key facts
- Planet.name
- TRAPPIST-1c
- Planet.image
- File:Rocky Exoplanet TRAPPIST-1 c (Artist Concept).jpg
- Planet.caption
- Artist's impression of TRAPPIST-1c (June 2023) with TRAPPIST-1b in the background
- Planet.discoverer
- Michaël Gillon et al.
- Planet.discovery_site
- TRAPPIST
- Planet.discovered
- May 2, 2016
- Planet.discovery_method
- Transit
- Planet.atmosphere_composition
- None or extremely thin (uncertain)
- Planet.apsis
- astron
- Planet.star
- TRAPPIST-1
- Planet.surface_grav
- g
- Planet.single_temperature
- (, equilibrium) (, surface)
via Wikipedia infobox
Exoplanet data
- Host star
- TRAPPIST-1
- Discovered
- 2016
- Discovered by
- La Silla Observatory
- Orbital period
- 2.42 days
- Radius
- 1.10 × Earth
- Mass
- 1.31 × Earth
- Equilibrium temp
- 339.70 K
- Distance
- 12.43 pc
via NASA Exoplanet Archive
Article
7 sectionsContents
- Physical characteristics
- Mass, radius, and temperature
- Orbit
- Host star
- Atmosphere
- See also
- References
TRAPPIST-1c is a mainly rocky exoplanet orbiting around the ultracool dwarf star TRAPPIST-1, located 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. 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.
==Physical characteristics== ===Mass, radius, and temperature=== TRAPPIST-1c was observed with the transit method, which enabled scientists to calculate its radius. Transit-timing variations and computer simulations were able to determine the mass, density, and gravity of the planet. TRAPPIST-1c is the third-largest planet of the TRAPPIST-1 system, with a radius of . It is also the third-most massive of the system, with a mass of , slightly lower than that of the next most massive, TRAPPIST-1g. Initial estimates suggested that TRAPPIST-1c has a lower density (4.89 g/cm3) and gravity (0.966g) than Earth, consistent with a rock-based composition and a thick, Venus-like atmosphere. However, refined density estimates show that the planet's density is similar to Earth.