55 Cnc B b
A confirmed exoplanet orbiting 55 Cnc B.
Compared with Earth
- Mass
- About 3.5 times Earth's mass.
- Year
- A year here lasts about 6.8 Earth days.
Planet
- Radius
- Unknown
- Mass
- 3.5 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 6.799 days
- Average distance from its star
- 0.044 AU
Star
- Host star
- 55 Cnc B
- Spectral class
- M — red dwarf
- Surface temperature
- 3,286 K
- Radius
- 0.274 × Sun
- Mass
- 0.26 × Sun
- Age
- 10 billion years
System
- Distance from Earth
- 40.7 light-years (12.48 parsecs)
- Stars in system
- 2
- Known planets
- 7
Discovery
- Year
- 2025
- Method
- Radial Velocity
- Facility
- Mauna Kea Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.