TRAPPIST-1 b
Description: TRAPPIST-1b is a terrestrial, Earth-sized exoplanet orbiting around the ultra-cool dwarf star TRAPPIST-1, located 40.7 light-years away from Earth in the constellation of Aquarius. The planet was detected using the transit method, where a planet dims the host star's light as it passes in front of it. It was first announced on May 2, 2016, and later studies were able to refine its physical parameters.
Physical Properties
Mass (Jupiter mass): 0.00432308745769223 MJ
Radius (Jupiter radius): 0.1 RJ
Density: 5.441939 g/cm³
Equilibrium Temperature: 397.6 K
Orbital Parameters
Orbital Period: 1.510826 days
Semi-major Axis: 0.01154 AU
Eccentricity: 0.00622
Inclination: 89.728°
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: b
Object ID: 3.11876
Host ID: 2.103803
Discovery Date: 2016-05
Discovery Year: 2016
Discovery Method: Transit
Discovery Locale: Ground
Discovery Facility: La Silla Observatory
Discovery Instrument: TRAPPISTCAM