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HD 18742 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 18742 b

Confirmed exoplanet · Gas Giant

HD 18742 b

Orbiting HD 18742

Discovered in 2011 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 18742 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,011
Method: Radial Velocity
Radius: 13.1 R⊕
Mass: 1,080.622 M⊕
Orbit: 766 days
Distance: 162.685 pc

Planet profile

Orbit and physical properties

Orbital period: 766 days
Semi-major axis: 1.82 AU
Eccentricity: 0.04
Radius: 13.1 Earth radii
Mass: 1,080.622 Earth masses
Mass provenance: Msini
Density: 2.64 g/cm³
Equilibrium temperature: 399.93 K
Insolation: 4.1964 Earth flux

Host system

Star and system properties

Host star: HD 18742
Stars in system: 1
Known planets in system: 1
Spectral type: G8/K0 IV
Stellar temperature: 4,940 K
Stellar radius: 5.13 R☉
Stellar mass: 1.36 M☉
Stellar metallicity: -0.04 dex
Stellar age: 2.3 Gyr
Distance: 162.685 parsecs
Right ascension: 03h00m10.63s
Declination: -20d48m09.73s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,011
Publication date: 2011-12
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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