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GJ 3942 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 3942 b

Confirmed exoplanet · Neptune Like

GJ 3942 b

Orbiting GJ 3942

Discovered in 2017 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 3942 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,017
Method: Radial Velocity
Radius: 2.57 R⊕
Mass: 7.14 M⊕
Orbit: 6.905 days
Distance: 16.9287 pc

Planet profile

Orbit and physical properties

Orbital period: 6.905 days
Semi-major axis: 0.0608 AU
Eccentricity: 0.121
Radius: 2.57 Earth radii
Mass: 7.14 Earth masses
Mass provenance: Msini
Density: 2.31 g/cm³
Equilibrium temperature: 590 K
Insolation: 20.5207 Earth flux

Host system

Star and system properties

Host star: GJ 3942
Stars in system: 1
Known planets in system: 1
Spectral type: M0
Stellar temperature: 3,867 K
Stellar radius: 0.61 R☉
Stellar mass: 0.63 M☉
Stellar metallicity: -0.04 dex
Stellar age: Not reported by the NASA Exoplanet Archive
Distance: 16.9287 parsecs
Right ascension: 16h09m03.49s
Declination: +52d56m38.92s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,017
Publication date: 2017-12
Discovery locale: Ground
Facility: Roque de los Muchachos Observatory
Telescope: 3.58 m Telescopio Nazionale Galileo
Instrument: HARPS-N Spectrograph
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from GJ 3942 b.

Generic neptune like catalog artwork; not a direct image of GJ 3942 b — Apex Andromeda catalog artwork