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HD 221287 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 221287 b

Confirmed exoplanet · Gas Giant

HD 221287 b

Orbiting HD 221287

Discovered in 2007 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 221287 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,007
Method: Radial Velocity
Radius: 13.1 R⊕
Mass: 982.05 M⊕
Orbit: 456.1 days
Distance: 55.9231 pc

Planet profile

Orbit and physical properties

Orbital period: 456.1 days
Semi-major axis: 1.25 AU
Eccentricity: 0.08
Radius: 13.1 Earth radii
Mass: 982.05 Earth masses
Mass provenance: Msini
Density: 2.4 g/cm³
Equilibrium temperature: 290.13 K
Insolation: 1.0624 Earth flux

Host system

Star and system properties

Host star: HD 221287
Stars in system: 1
Known planets in system: 1
Spectral type: F7 V
Stellar temperature: 6,304 K
Stellar radius: 1.13864 R☉
Stellar mass: 1.25 M☉
Stellar metallicity: -0.03 dex
Stellar age: 1.3 Gyr
Distance: 55.9231 parsecs
Right ascension: 23h31m20.69s
Declination: -58d12m35.11s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,007
Publication date: 2007-08
Discovery locale: Ground
Facility: La Silla Observatory
Telescope: 3.6 m ESO Telescope
Instrument: HARPS Spectrograph
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from HD 221287 b.

Generic gas giant catalog artwork; not a direct image of HD 221287 b — Apex Andromeda catalog artwork