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GJ 876 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 876 b

Confirmed exoplanet · Gas Giant

GJ 876 b

Orbiting GJ 876

Discovered in 1998 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic gas giant catalog artwork; not a direct image of GJ 876 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 1,998
Method: Radial Velocity
Radius: 13.3 R⊕
Mass: 723.2235 M⊕
Orbit: 61.1166 days
Distance: 4.67517 pc

Planet profile

Orbit and physical properties

Orbital period: 61.1166 days
Semi-major axis: 0.208317 AU
Eccentricity: 0.0324
Radius: 13.3 Earth radii
Mass: 723.2235 Earth masses
Mass provenance: Mass
Density: 1.69 g/cm³
Equilibrium temperature: 190.6 K
Insolation: 0.2857 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: 1,998
Publication date: 1998-10
Discovery locale: Ground
Facility: Multiple Observatories
Telescope: Multiple Telescopes
Instrument: Multiple Instruments
NASA Exoplanet Archive: Open composite record ↗

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