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GJ 3998 c | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 3998 c

Confirmed exoplanet · Super Earth

GJ 3998 c

Orbiting GJ 3998

Discovered in 2016 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 3998 c — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,016
Method: Radial Velocity
Radius: 2.5 R⊕
Mass: 6.82 M⊕
Orbit: 13.727 days
Distance: 18.1459 pc

Planet profile

Orbit and physical properties

Orbital period: 13.727 days
Semi-major axis: 0.09 AU
Eccentricity: 0
Radius: 2.5 Earth radii
Mass: 6.82 Earth masses
Mass provenance: Msini
Density: 2.4 g/cm³
Equilibrium temperature: 423.49 K
Insolation: 5.4 Earth flux

Host system

Star and system properties

Host star: GJ 3998
Stars in system: 1
Known planets in system: 3
Spectral type: M1
Stellar temperature: 3,726 K
Stellar radius: 0.5 R☉
Stellar mass: 0.52 M☉
Stellar metallicity: -0.13 dex
Stellar age: 8.38 Gyr
Distance: 18.1459 parsecs
Right ascension: 17h16m00.49s
Declination: +11d03m22.23s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,016
Publication date: 2016-10
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 ↗

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