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GJ 2126 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 2126 b

Confirmed exoplanet · Gas Giant

GJ 2126 b

Orbiting GJ 2126

Discovered in 2025 using Radial Velocity. 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 GJ 2126 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,025
Method: Radial Velocity
Radius: 13.6 R⊕
Mass: 413.176929 M⊕
Orbit: 272.7 days
Distance: 38.129 pc

Planet profile

Orbit and physical properties

Orbital period: 272.7 days
Semi-major axis: 0.71 AU
Eccentricity: 0.85
Radius: 13.6 Earth radii
Mass: 413.176929 Earth masses
Mass provenance: Msini
Density: 0.903 g/cm³
Equilibrium temperature: 203.08 K
Insolation: 0.2833 Earth flux

Host system

Star and system properties

Host star: GJ 2126
Stars in system: 1
Known planets in system: 1
Spectral type: M0 V
Stellar temperature: 4,159 K
Stellar radius: 0.728 R☉
Stellar mass: 0.65 M☉
Stellar metallicity: 0.6 dex
Stellar age: Not reported by the NASA Exoplanet Archive
Distance: 38.129 parsecs
Right ascension: 17h09m26.56s
Declination: -35d23m30.19s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,025
Publication date: 2025-02
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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