BD+20 2457 c
A confirmed exoplanet orbiting BD+20 2457.
Compared with Earth
- Mass
- About 3,963 times Earth's mass.
- Year
- A year here lasts about 1.7 Earth years.
Planet
- Radius
- Unknown
- Mass
- 3,963 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 622 days
- Average distance from its star
- 2.01 AU
Star
- Host star
- BD+20 2457
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,137 K
- Radius
- 49 × Sun
- Mass
- 2.8 × Sun
- Age
- Unknown
System
- Distance from Earth
- 5,022 light-years (1,540 parsecs)
- Stars in system
- 1
- Known planets
- 2
Discovery
- Year
- 2009
- Method
- Radial Velocity
- Facility
- McDonald Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.