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GJ 9827 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/GJ 9827 b

Confirmed exoplanet · Terrestrial

GJ 9827 b

Orbiting GJ 9827

Discovered in 2017 using Transit. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic terrestrial catalog artwork; not a direct image of GJ 9827 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,017
Method: Transit
Radius: 1.44 R⊕
Mass: 4.28 M⊕
Orbit: 1.208974 days
Distance: 29.661 pc

Planet profile

Orbit and physical properties

Orbital period: 1.208974 days
Semi-major axis: 0.0189 AU
Eccentricity: 0
Radius: 1.44 Earth radii
Mass: 4.28 Earth masses
Mass provenance: Mass
Density: 7.858 g/cm³
Equilibrium temperature: 1,035.01 K
Insolation: 318 Earth flux

Host system

Star and system properties

Host star: GJ 9827
Stars in system: 1
Known planets in system: 3
Spectral type: K7 V
Stellar temperature: 4,236 K
Stellar radius: 0.58 R☉
Stellar mass: 0.62 M☉
Stellar metallicity: -0.29 dex
Stellar age: 5.465 Gyr
Distance: 29.661 parsecs
Right ascension: 23h27m05.23s
Declination: -01d17m07.24s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,017
Publication date: 2017-12
Discovery locale: Space
Facility: K2
Telescope: 0.95 m Kepler Telescope
Instrument: Kepler CCD Array
NASA Exoplanet Archive: Open composite record ↗

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