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GJ 3138 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 3138 b

Confirmed exoplanet · Terrestrial

GJ 3138 b

Orbiting GJ 3138

Discovered in 2017 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic terrestrial catalog artwork; not a direct image of GJ 3138 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,017
Method: Radial Velocity
Radius: 1.18 R⊕
Mass: 1.78 M⊕
Orbit: 1.22003 days
Distance: 28.4712 pc

Planet profile

Orbit and physical properties

Orbital period: 1.22003 days
Semi-major axis: 0.0197 AU
Eccentricity: 0.19
Radius: 1.18 Earth radii
Mass: 1.78 Earth masses
Mass provenance: Msini
Density: 5.95 g/cm³
Equilibrium temperature: 902.98 K
Insolation: 118.1 Earth flux

Host system

Star and system properties

Host star: GJ 3138
Stars in system: 1
Known planets in system: 3
Spectral type: M0
Stellar temperature: 3,717 K
Stellar radius: 0.5 R☉
Stellar mass: 0.681 M☉
Stellar metallicity: -0.3 dex
Stellar age: Not reported by the NASA Exoplanet Archive
Distance: 28.4712 parsecs
Right ascension: 02h09m11.46s
Declination: -16d20m21.30s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,017
Publication date: 2017-06
Discovery locale: Ground
Facility: La Silla Observatory
Telescope: 3.6 m ESO Telescope
Instrument: HARPS Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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