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GJ 876 d | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 876 d

Confirmed exoplanet · Neptune Like

GJ 876 d

Orbiting GJ 876

Discovered in 2005 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 876 d — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,005
Method: Radial Velocity
Radius: 2.51 R⊕
Mass: 6.83 M⊕
Orbit: 1.93778 days
Distance: 4.67517 pc

Planet profile

Orbit and physical properties

Orbital period: 1.93778 days
Semi-major axis: 0.020807 AU
Eccentricity: 0.207
Radius: 2.51 Earth radii
Mass: 6.83 Earth masses
Mass provenance: Mass
Density: 2.37 g/cm³
Equilibrium temperature: 603.09 K
Insolation: 28.6429 Earth flux

Host system

Star and system properties

Host star: GJ 876
Stars in system: 1
Known planets in system: 4
Spectral type: M2.5V
Stellar temperature: 3,293.74 K
Stellar radius: 0.3 R☉
Stellar mass: 0.32 M☉
Stellar metallicity: 0.2129 dex
Stellar age: 1 Gyr
Distance: 4.67517 parsecs
Right ascension: 22h53m17.75s
Declination: -14d15m59.74s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,005
Publication date: 2005-11
Discovery locale: Ground
Facility: W. M. Keck Observatory
Telescope: 10 m Keck I Telescope
Instrument: HIRES Spectrometer
NASA Exoplanet Archive: Open composite record ↗

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