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55 Cnc b | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/55 Cnc b

Confirmed exoplanet · Gas Giant

55 Cnc b

Orbiting 55 Cnc

Discovered in 1996 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 55 Cnc b — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 1,996
Method: Radial Velocity
Radius: 13.9 R⊕
Mass: 263.9785 M⊕
Orbit: 14.651552 days
Distance: 12.5855 pc

Planet profile

Orbit and physical properties

Orbital period: 14.651552 days
Semi-major axis: 0.118 AU
Eccentricity: 0.0029
Radius: 13.9 Earth radii
Mass: 263.9785 Earth masses
Mass provenance: Mass
Density: 0.54 g/cm³
Equilibrium temperature: 700 K
Insolation: 45.6336 Earth flux

Host system

Star and system properties

Host star: 55 Cnc
Stars in system: 2
Known planets in system: 7
Spectral type: G8 V
Stellar temperature: 5,198 K
Stellar radius: 0.98 R☉
Stellar mass: 1.015 M☉
Stellar metallicity: 0.39 dex
Stellar age: 10 Gyr
Distance: 12.5855 parsecs
Right ascension: 08h52m35.24s
Declination: +28d19m47.34s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 1,996
Publication date: 1997-01
Discovery locale: Ground
Facility: Lick Observatory
Telescope: 3.0 m C. Donald Shane Telescope
Instrument: Hamilton Echelle Spectrograph
NASA Exoplanet Archive: Open composite record ↗

Visual archive

Gallery

One image from 55 Cnc b.

Generic gas giant catalog artwork; not a direct image of 55 Cnc b — Apex Andromeda catalog artwork