WASP-121 b
Description: WASP-121b, formally named Tylos, is an exoplanet orbiting the star WASP-121. WASP-121b is the first exoplanet found with an extrasolar planetary stratosphere and the first that contains water. WASP-121b is in the constellation Puppis, and is about 858 light-years from Earth.
Physical Properties
Mass (Jupiter mass): 1.157 MJ
Radius (Jupiter radius): 1.753 RJ
Density: 0.266 g/cm³
Equilibrium Temperature: 2720.0 K
Orbital Parameters
Orbital Period: 1.27492504 days
Semi-major Axis: 0.02596 AU
Eccentricity: Unknown
Inclination: 88.49°
Host Star Properties
Host Star: WASP-121
Spectral Type: F6 V
Temperature: 6776.0 K
Stellar Mass: 1.36 M☉
Stellar Radius: 1.46 R☉
Discovery Information
Planet Letter: b
Object ID: 3.119
Host ID: 2.103818
Discovery Date: 2016-06
Discovery Year: 2016
Discovery Method: Transit
Discovery Locale: Ground
Discovery Facility: SuperWASP
Discovery Instrument: e2v CCD Camera