TRAPPIST-1 g
Description: TRAPPIST-1g, also designated as 2MASS J23062928-0502285 g and K2-112 g, is an exoplanet orbiting around the ultra-cool dwarf star TRAPPIST-1, located 40.7 light-years away from Earth in the constellation Aquarius. It was one of four new exoplanets to be discovered orbiting the star in 2017 using observations from the Spitzer Space Telescope. The exoplanet is within the optimistic habitable zone of its host star. It was found by using the transit method, in which the dimming effect that a planet causes as it crosses in front of its star is measured.
Physical Properties
Mass (Jupiter mass): 0.00415633080903306 MJ
Radius (Jupiter radius): 0.101 RJ
Density: 5.055986 g/cm³
Equilibrium Temperature: 197.3 K
Orbital Parameters
Orbital Period: 12.352446 days
Semi-major Axis: 0.04683 AU
Eccentricity: 0.00208
Inclination: 89.742°
Host Star Properties
Host Star: TRAPPIST-1
Spectral Type: Unknown
Temperature: 2566.0 K
Stellar Mass: 0.09 M☉
Stellar Radius: 0.12 R☉
Discovery Information
Planet Letter: g
Object ID: 3.11992
Host ID: 2.103803
Discovery Date: 2016-05
Discovery Year: 2017
Discovery Method: Transit
Discovery Locale: Multiple Locales
Discovery Facility: Multiple Observatories
Discovery Instrument: Multiple Instruments