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18 Del b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/18 Del b

Confirmed exoplanet · Gas Giant

18 Del b

Orbiting 18 Del

Discovered in 2008 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 18 Del b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,008
Method: Radial Velocity
Radius: 12.5 R⊕
Mass: 2,926.246143 M⊕
Orbit: 982.85 days
Distance: 76.222 pc

Planet profile

Orbit and physical properties

Orbital period: 982.85 days
Semi-major axis: 2.476 AU
Eccentricity: 0.024
Radius: 12.5 Earth radii
Mass: 2,926.246143 Earth masses
Mass provenance: Msini
Density: 8.23 g/cm³
Equilibrium temperature: 452.72 K
Insolation: 7.0173 Earth flux

Host system

Star and system properties

Host star: 18 Del
Stars in system: 2
Known planets in system: 1
Spectral type: G6 III
Stellar temperature: 4,980 K
Stellar radius: 8.8 R☉
Stellar mass: 2.1 M☉
Stellar metallicity: -0.06 dex
Stellar age: 1.1 Gyr
Distance: 76.222 parsecs
Right ascension: 20h58m25.88s
Declination: +10d50m20.90s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,008
Publication date: 2008-06
Discovery locale: Ground
Facility: Okayama Astrophysical Observatory
Telescope: 1.88 m Telescope
Instrument: HIDES Echelle Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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