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WASP-121 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/WASP-121 b

Confirmed exoplanet · Gas Giant

WASP-121 b

Orbiting WASP-121

Discovered in 2016 using Transit. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

WASP 121-b (artist’s impression), an official ESA/Hubble exoplanet image or artist concept — Sourced object or system artworkNASA, ESA, Q. Changeat et al., M. Zamani (ESA/Hubble)

Discovery: 2,016
Method: Transit
Radius: 19.526044 R⊕
Mass: 371.859236 M⊕
Orbit: 1.274925 days
Distance: 269.898 pc

Planet profile

Orbit and physical properties

Orbital period: 1.274925 days
Semi-major axis: 0.02571 AU
Eccentricity: 0.0085
Radius: 19.526044 Earth radii
Mass: 371.859236 Earth masses
Mass provenance: Mass
Density: 0.275 g/cm³
Equilibrium temperature: 2,409 K
Insolation: 6,216.41 Earth flux

Host system

Star and system properties

Host star: WASP-121
Stars in system: 1
Known planets in system: 1
Spectral type: F6 V
Stellar temperature: 6,628 K
Stellar radius: 1.461 R☉
Stellar mass: 1.33 M☉
Stellar metallicity: 0.17 dex
Stellar age: 1.11 Gyr
Distance: 269.898 parsecs
Right ascension: 07h10m24.06s
Declination: -39d05m50.17s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,016
Publication date: 2016-06
Discovery locale: Ground
Facility: SuperWASP
Telescope: Canon 200mm f/1.8L
Instrument: e2v CCD Camera
NASA Exoplanet Archive: Open composite record ↗

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