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WASP-21 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/WASP-21 b

Confirmed exoplanet · Gas Giant

WASP-21 b

Orbiting WASP-21

Discovered in 2010 using Transit. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic gas giant catalog artwork; not a direct image of WASP-21 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,010
Method: Transit
Radius: 11.99 R⊕
Mass: 95.345 M⊕
Orbit: 4.322482 days
Distance: 258.426 pc

Planet profile

Orbit and physical properties

Orbital period: 4.322482 days
Semi-major axis: 0.052 AU
Eccentricity: 0
Radius: 11.99 Earth radii
Mass: 95.345 Earth masses
Mass provenance: Mass
Density: 0.32 g/cm³
Equilibrium temperature: 1,333 K
Insolation: 705.0438 Earth flux

Host system

Star and system properties

Host star: WASP-21
Stars in system: 1
Known planets in system: 1
Spectral type: G3 V
Stellar temperature: 5,800 K
Stellar radius: 1.06 R☉
Stellar mass: 1.01 M☉
Stellar metallicity: -0.22 dex
Stellar age: 12 Gyr
Distance: 258.426 parsecs
Right ascension: 23h09m58.27s
Declination: +18d23m46.17s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,010
Publication date: 2010-09
Discovery locale: Ground
Facility: SuperWASP
Telescope: Canon 200mm f/1.8L
Instrument: iKon-L CCD Camera
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from WASP-21 b.

Generic gas giant catalog artwork; not a direct image of WASP-21 b — Apex Andromeda catalog artwork