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GJ 251 c | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 251 c

Confirmed exoplanet · Super Earth

GJ 251 c

Orbiting GJ 251

Discovered in 2025 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic super earth catalog artwork; not a direct image of GJ 251 c — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,025
Method: Radial Velocity
Radius: 1.8 R⊕
Mass: 3.88 M⊕
Orbit: 53.647 days
Distance: 5.58057 pc

Planet profile

Orbit and physical properties

Orbital period: 53.647 days
Semi-major axis: 0.196 AU
Eccentricity: 0
Radius: 1.8 Earth radii
Mass: 3.88 Earth masses
Mass provenance: Msini
Density: 3.66 g/cm³
Equilibrium temperature: 216 K
Insolation: 0.404 Earth flux

Host system

Star and system properties

Host star: GJ 251
Stars in system: 1
Known planets in system: 2
Spectral type: M3.0 V
Stellar temperature: 3,342 K
Stellar radius: 0.36 R☉
Stellar mass: 0.35 M☉
Stellar metallicity: 0.07 dex
Stellar age: 6.8 Gyr
Distance: 5.58057 parsecs
Right ascension: 06h54m48.06s
Declination: +33d15m59.27s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,025
Publication date: 2025-11
Discovery locale: Ground
Facility: Multiple Observatories
Telescope: Multiple Telescopes
Instrument: Multiple Instruments
NASA Exoplanet Archive: Open composite record ↗

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