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HD 39855 b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/HD 39855 b

Confirmed exoplanet · Neptune Like

HD 39855 b

Orbiting HD 39855

Discovered in 2019 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic neptune like catalog artwork; not a direct image of HD 39855 b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,019
Method: Radial Velocity
Radius: 2.85 R⊕
Mass: 8.5 M⊕
Orbit: 3.2498 days
Distance: 23.2599 pc

Planet profile

Orbit and physical properties

Orbital period: 3.2498 days
Semi-major axis: 0.041 AU
Eccentricity: 0.14
Radius: 2.85 Earth radii
Mass: 8.5 Earth masses
Mass provenance: Msini
Density: 2.02 g/cm³
Equilibrium temperature: 1,145.89 K
Insolation: 287.2 Earth flux

Host system

Star and system properties

Host star: HD 39855
Stars in system: 1
Known planets in system: 1
Spectral type: G8 V
Stellar temperature: 5,576 K
Stellar radius: 0.744665 R☉
Stellar mass: 0.87 M☉
Stellar metallicity: Not reported by the NASA Exoplanet Archive
Stellar age: Not reported by the NASA Exoplanet Archive
Distance: 23.2599 parsecs
Right ascension: 05h54m30.26s
Declination: -19d42m16.01s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,019
Publication date: 2019-06
Discovery locale: Ground
Facility: Las Campanas Observatory
Telescope: 6.5 m Magellan II Clay Telescope
Instrument: Carnegie Planet Finder Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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