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HD 191939 e | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 191939 e

Confirmed exoplanet · Gas Giant

HD 191939 e

Orbiting HD 191939

Discovered in 2022 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 HD 191939 e — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,022
Method: Radial Velocity
Radius: 13 R⊕
Mass: 112.2 M⊕
Orbit: 101.12 days
Distance: 53.6089 pc

Planet profile

Orbit and physical properties

Orbital period: 101.12 days
Semi-major axis: 0.407 AU
Eccentricity: 0.031
Radius: 13 Earth radii
Mass: 112.2 Earth masses
Mass provenance: Msini
Density: 0.281 g/cm³
Equilibrium temperature: 390 K
Insolation: 3.9 Earth flux

Host system

Star and system properties

Host star: HD 191939
Stars in system: 1
Known planets in system: 6
Spectral type: G9 V
Stellar temperature: 5,348 K
Stellar radius: 0.94 R☉
Stellar mass: 0.81 M☉
Stellar metallicity: -0.15 dex
Stellar age: 8.7 Gyr
Distance: 53.6089 parsecs
Right ascension: 20h08m06.15s
Declination: +66d51m01.09s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,022
Publication date: 2022-02
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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