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HD 171238 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 171238 b

Confirmed exoplanet · Gas Giant

HD 171238 b

Orbiting HD 171238

Discovered in 2009 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 171238 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,009
Method: Radial Velocity
Radius: 12.5 R⊕
Mass: 2,796.889982 M⊕
Orbit: 1,515 days
Distance: 44.8113 pc

Planet profile

Orbit and physical properties

Orbital period: 1,515 days
Semi-major axis: 2.518 AU
Eccentricity: 0.358
Radius: 12.5 Earth radii
Mass: 2,796.889982 Earth masses
Mass provenance: Mass
Density: 7.87 g/cm³
Equilibrium temperature: 166.96 K
Insolation: 0.0989 Earth flux

Host system

Star and system properties

Host star: HD 171238
Stars in system: 1
Known planets in system: 1
Spectral type: G8 V
Stellar temperature: 5,467 K
Stellar radius: 1.01 R☉
Stellar mass: 0.92 M☉
Stellar metallicity: 0.2 dex
Stellar age: 7 Gyr
Distance: 44.8113 parsecs
Right ascension: 18h34m43.64s
Declination: -28d04m22.03s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,009
Publication date: 2010-02
Discovery locale: Ground
Facility: La Silla Observatory
Telescope: 1.2 m Leonhard Euler Telescope
Instrument: CORALIE Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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