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HD 191939 g | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 191939 g

Confirmed exoplanet · Neptune Like

HD 191939 g

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 neptune like catalog artwork; not a direct image of HD 191939 g — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,022
Method: Radial Velocity
Radius: 3.74 R⊕
Mass: 13.5 M⊕
Orbit: 284 days
Distance: 53.6089 pc

Planet profile

Orbit and physical properties

Orbital period: 284 days
Semi-major axis: 0.812 AU
Eccentricity: 0.03
Radius: 3.74 Earth radii
Mass: 13.5 Earth masses
Mass provenance: Msini
Density: 1.42 g/cm³
Equilibrium temperature: 278 K
Insolation: 0.99 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: 2023-01
Discovery locale: Ground
Facility: Multiple Observatories
Telescope: Multiple Telescopes
Instrument: Multiple Instruments
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from HD 191939 g.

Generic neptune like catalog artwork; not a direct image of HD 191939 g — Apex Andromeda catalog artwork