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GJ 1214 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 1214 b

Confirmed exoplanet · Neptune Like

GJ 1214 b

Orbiting GJ 1214

Discovered in 2009 using Transit. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic neptune like catalog artwork; not a direct image of GJ 1214 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,009
Method: Transit
Radius: 2.733 R⊕
Mass: 8.41 M⊕
Orbit: 1.580405 days
Distance: 14.6427 pc

Planet profile

Orbit and physical properties

Orbital period: 1.580405 days
Semi-major axis: 0.01505 AU
Eccentricity: 0.0062
Radius: 2.733 Earth radii
Mass: 8.41 Earth masses
Mass provenance: Mass
Density: 2.26 g/cm³
Equilibrium temperature: 567 K
Insolation: 17.2 Earth flux

Host system

Star and system properties

Host star: GJ 1214
Stars in system: 1
Known planets in system: 1
Spectral type: M4 V
Stellar temperature: 3,101 K
Stellar radius: 0.2162 R☉
Stellar mass: 0.182 M☉
Stellar metallicity: 0.24 dex
Stellar age: 3 Gyr
Distance: 14.6427 parsecs
Right ascension: 17h15m19.54s
Declination: +04d57m38.45s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,009
Publication date: 2009-12
Discovery locale: Ground
Facility: MEarth Project
Telescope: 0.4 m MEarth Telescope
Instrument: Apogee CCD Sensor
NASA Exoplanet Archive: Open composite record ↗

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