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HD 81817 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 81817 b

Confirmed exoplanet · Gas Giant

HD 81817 b

Orbiting HD 81817

Discovered in 2020 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 81817 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,020
Method: Radial Velocity
Radius: 12 R⊕
Mass: 7,668.563804 M⊕
Orbit: 1,021.20159 days
Distance: 269.126 pc

Planet profile

Orbit and physical properties

Orbital period: 1,021.20159 days
Semi-major axis: 3.233 AU
Eccentricity: 0.097
Radius: 12 Earth radii
Mass: 7,668.563804 Earth masses
Mass provenance: Mass
Density: 24.4 g/cm³
Equilibrium temperature: 1,016.37 K
Insolation: 174.402 Earth flux

Host system

Star and system properties

Host star: HD 81817
Stars in system: 1
Known planets in system: 2
Spectral type: K3 III
Stellar temperature: 4,140 K
Stellar radius: 83.8 R☉
Stellar mass: 4.3 M☉
Stellar metallicity: -0.17 dex
Stellar age: 0.15 Gyr
Distance: 269.126 parsecs
Right ascension: 09h37m05.18s
Declination: +81d19m34.71s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,020
Publication date: 2020-06
Discovery locale: Ground
Facility: Bohyunsan Optical Astronomical Observatory
Telescope: 1.8 m Telescope
Instrument: BOES Echelle Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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