Proxima Cen d
A confirmed exoplanet orbiting Proxima Cen.
Compared with Earth
- Mass
- About 26% of Earth's mass.
- Temperature
- About 9 °C (48 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 1.8 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 5.1 Earth days.
Planet
- Radius
- Unknown
- Mass
- 0.26 × Earth
- Density
- Unknown
- Equilibrium temperature
- 282 K
- Starlight received
- 1.814 × Earth
- Orbital period
- 5.123 days
- Average distance from its star
- 0.02881 AU
Star
- Host star
- Proxima Cen
- Spectral class
- M — red dwarf
- Surface temperature
- 2,900 K
- Radius
- 0.141 × Sun
- Mass
- 0.1221 × Sun
- Age
- Unknown
System
- Distance from Earth
- 4.244 light-years (1.301 parsecs)
- Stars in system
- 3
- Known planets
- 2
Discovery
- Year
- 2025
- Method
- Radial Velocity
- Facility
- La Silla Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.