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GJ 338 B b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 338 B b

Confirmed exoplanet · Neptune Like

GJ 338 B b

Orbiting GJ 338 B

Discovered in 2020 using Radial Velocity. 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 338 B b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,020
Method: Radial Velocity
Radius: 3.25 R⊕
Mass: 10.6 M⊕
Orbit: 24.422 days
Distance: 6.33256 pc

Planet profile

Orbit and physical properties

Orbital period: 24.422 days
Semi-major axis: 0.142 AU
Eccentricity: 0.109
Radius: 3.25 Earth radii
Mass: 10.6 Earth masses
Mass provenance: Msini
Density: 1.7 g/cm³
Equilibrium temperature: 391 K
Insolation: 3.9278 Earth flux

Host system

Star and system properties

Host star: GJ 338 B
Stars in system: 2
Known planets in system: 1
Spectral type: M0 V
Stellar temperature: 4,014 K
Stellar radius: 0.58 R☉
Stellar mass: 0.64 M☉
Stellar metallicity: -0.03 dex
Stellar age: 4 Gyr
Distance: 6.33256 parsecs
Right ascension: 09h14m22.00s
Declination: +52d41m00.68s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,020
Publication date: 2020-05
Discovery locale: Ground
Facility: Calar Alto Observatory
Telescope: 3.5 m telescope
Instrument: CARMENES
NASA Exoplanet Archive: Open composite record ↗

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