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HD 4203 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 4203 b

Confirmed exoplanet · Gas Giant

HD 4203 b

Orbiting HD 4203

Discovered in 2001 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 4203 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,001
Method: Radial Velocity
Radius: 13.3 R⊕
Mass: 708.7609 M⊕
Orbit: 431.88 days
Distance: 81.3795 pc

Planet profile

Orbit and physical properties

Orbital period: 431.88 days
Semi-major axis: 1.17 AU
Eccentricity: 0.52
Radius: 13.3 Earth radii
Mass: 708.7609 Earth masses
Mass provenance: Msini
Density: 1.66 g/cm³
Equilibrium temperature: 297.28 K
Insolation: 1.4338 Earth flux

Host system

Star and system properties

Host star: HD 4203
Stars in system: 1
Known planets in system: 2
Spectral type: G5
Stellar temperature: 5,596 K
Stellar radius: 1.42 R☉
Stellar mass: 1.25 M☉
Stellar metallicity: 0.4 dex
Stellar age: 8.52 Gyr
Distance: 81.3795 parsecs
Right ascension: 00h44m41.33s
Declination: +20d26m54.21s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,001
Publication date: 2002-03
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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