55 Cnc e
A confirmed exoplanet orbiting 55 Cnc.
Compared with Earth
- Size
- About 1.9 times Earth's width.
- Mass
- About 8 times Earth's mass.
- Year
- A year here lasts about 18 hours.
Planet
- Radius
- 1.875 × Earth
- Mass
- 7.99 × Earth
- Density
- 6.66 g/cm³
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 0.7365 days
- Average distance from its star
- 0.01544 AU
Star
- Host star
- 55 Cnc
- Spectral class
- K — orange dwarf
- Surface temperature
- 5,172 K
- Radius
- 0.943 × Sun
- Mass
- 0.905 × Sun
- Age
- Unknown
System
- Distance from Earth
- 41.05 light-years (12.59 parsecs)
- Stars in system
- 2
- Known planets
- 7
Discovery
- Year
- 2004
- Method
- Radial Velocity
- Facility
- McDonald Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.