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55 Cnc e | Exoplanets | Apex Andromeda | Apex Andromeda

Planets/Exoplanets/55 Cnc e

Confirmed exoplanet · Super Earth

55 Cnc e

Orbiting 55 Cnc

Discovered in 2004 using Radial Velocity. This page reflects the latest synchronized NASA Exoplanet Archive composite record.

NASA Archive record ↗Back to catalog →

Generic super earth catalog artwork; not a direct image of 55 Cnc e — Generic category artwork—not a direct imageApex Andromeda catalog artwork

Discovery: 2,004
Method: Radial Velocity
Radius: 1.875 R⊕
Mass: 7.99 M⊕
Orbit: 0.736547 days
Distance: 12.5855 pc

Planet profile

Orbit and physical properties

Orbital period: 0.736547 days
Semi-major axis: 0.01544 AU
Eccentricity: 0.05
Radius: 1.875 Earth radii
Mass: 7.99 Earth masses
Mass provenance: Mass
Density: 6.66 g/cm³
Equilibrium temperature: 1,958 K
Insolation: 2,657.8322 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: 5,172 K
Stellar radius: 0.943 R☉
Stellar mass: 0.905 M☉
Stellar metallicity: 0.35 dex
Stellar age: 5.5 Gyr
Distance: 12.5855 parsecs
Right ascension: 08h52m35.24s
Declination: +28d19m47.34s

Discovery

Detection and provenance

Discovery method: Radial Velocity
Discovery year: 2,004
Publication date: 2004-10
Discovery locale: Ground
Facility: McDonald Observatory
Telescope: 9.2 m Hobby-Eberly Telescope
Instrument: High Resolution Spectrograph
NASA Exoplanet Archive: Open composite record ↗

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