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HD 4208 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 4208 b

Confirmed exoplanet · Gas Giant

HD 4208 b

Orbiting HD 4208

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 4208 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,001
Method: Radial Velocity
Radius: 13.9 R⊕
Mass: 257.4423 M⊕
Orbit: 832.97 days
Distance: 34.1937 pc

Planet profile

Orbit and physical properties

Orbital period: 832.97 days
Semi-major axis: 1.662 AU
Eccentricity: 0.042
Radius: 13.9 Earth radii
Mass: 257.4423 Earth masses
Mass provenance: Msini
Density: 0.527 g/cm³
Equilibrium temperature: 196.68 K
Insolation: 0.2878 Earth flux

Host system

Star and system properties

Host star: HD 4208
Stars in system: 1
Known planets in system: 1
Spectral type: G7 V Fe-1 CH-0.5
Stellar temperature: 5,717 K
Stellar radius: 0.846 R☉
Stellar mass: 0.883 M☉
Stellar metallicity: -0.28 dex
Stellar age: 3.813 Gyr
Distance: 34.1937 parsecs
Right ascension: 00h44m27.01s
Declination: -26d30m54.14s

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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