55 Cnc e
Orbiting 55 Cnc
55 Cnc e is an exoplanet orbiting the star 55 Cnc, discovered in 2004 using the Radial Velocity method. It is a Super-Earth world.
Radius
1.88
Earth radii
Mass
7.99
Earth masses
Orbital Period
0.7
days
Distance
12.6
parsecs
Radius (Earth radii)
1.88
Mass (Earth masses)
7.99
Measured
Equilibrium Temperature
Unknown
Parameter source: Bourrier et al. 2018
Orbital Period
0.737+0.000−0.000days
Semi-Major Axis
0.0154+0.0001−0.0001au
Planet Mass (Earth masses)
7.99+0.32−0.33
Planet Mass (Jupiter masses)
0.0251+0.0010−0.0010
Eccentricity
0.0500+0.0300−0.0300
Argument of Periastron
86.0+30.7−33.4deg
Radial Velocity Semi-Amplitude
6.02+0.24−0.23m/s
Distance from Earth
12.6 pc (~41 ly)
Spectral Type
Unknown
Temperature
5172 K
Mass (Solar)
0.91 M☉
Radius (Solar)
0.94 R☉
Luminosity
Unknown
Planets in System
7
Stars in System
2
Coordinates (RA, Dec)
133.1468°, 28.3298°
Discovery Method
Radial Velocity
Discovery Year
2004
Source ID: 55 Cnc e
55 Cnc e orbits 55 Cnc and was reported in 2004 and was detected with the Radial Velocity method.
Published measurements list a radius of 1.88 Earth radii, a mass of 7.99 Earth masses, and an orbital period of 0.74 days.
Catalog data places the system at about 12.6 parsecs from Earth and 7 known planets in the system.
Host star
Explore the stellar record for this system to compare temperature, spectral type, and known planets.
Open 55 Cnc