4 UMa b
A confirmed exoplanet orbiting 4 UMa.
Compared with Earth
- Mass
- About 2,511 times Earth's mass.
- Year
- A year here lasts about 270 Earth days.
Planet
- Radius
- Unknown
- Mass
- 2,511 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 270.3 days
- Average distance from its star
- 0.877 AU
Star
- Host star
- 4 UMa
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,415 K
- Radius
- 18.11 × Sun
- Mass
- 1.234 × Sun
- Age
- 4.604 billion years
System
- Distance from Earth
- 239.6 light-years (73.46 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2006
- Method
- Radial Velocity
- Facility
- Thueringer Landessternwarte Tautenburg
Data from the NASA Exoplanet Archive, synced October 14, 2026.