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K2-139 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/K2-139 b

Confirmed exoplanet · Gas Giant

K2-139 b

Orbiting K2-139

Discovered in 2017 using Transit. 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 K2-139 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,017
Method: Transit
Radius: 9.11 R⊕
Mass: 123.00021 M⊕
Orbit: 28.380619 days
Distance: 153.856 pc

Planet profile

Orbit and physical properties

Orbital period: 28.380619 days
Semi-major axis: 0.1796 AU
Eccentricity: 0.12
Radius: 9.11 Earth radii
Mass: 123.00021 Earth masses
Mass provenance: Mass
Density: 0.91 g/cm³
Equilibrium temperature: 524 K
Insolation: 15.5562 Earth flux

Host system

Star and system properties

Host star: K2-139
Stars in system: 1
Known planets in system: 1
Spectral type: K0 V
Stellar temperature: 5,370 K
Stellar radius: 0.88 R☉
Stellar mass: 0.96 M☉
Stellar metallicity: 0.24 dex
Stellar age: 1.8 Gyr
Distance: 153.856 parsecs
Right ascension: 19h16m16.01s
Declination: -17d54m38.57s

Discovery

Detection and provenance

Discovery method: Transit
Discovery year: 2,017
Publication date: 2018-04
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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