Proxima Cen b
📋 A written introduction is coming — for now this page shows official values only.
Planet
- Host star
- Proxima Cen
- Distance from Earth
- 1.3012 pc (≈ 4.2 light-years)
- NASA planet type
- Super Earth
- Radius (Earth = 1)
- 1.02
- Mass (Earth = 1)
- 1.055
- Orbital period
- 11.1847 days
- Semi-major axis
- 0.04848 AU
- Eccentricity
- 0
- Equilibrium temperature
- 218 K
- Discovery method
- Radial Velocity
- Discovery year
- 2,016
- Discovery facility
- European Southern Observatory
- Host spectral type
- M5.5 V
- Host temperature
- 2,900 K
- Host radius (Sun = 1)
- 0.141
- Host mass (Sun = 1)
- 0.1221
- Host brightness
- 11.01 mag
Source:NASA Exoplanet Archive (Caltech/IPAC) · checked 2026-11-02 ↗NASA Science · checked 2026-11-02 ↗NASA Exoplanet Archive (Caltech/IPAC) · checked 2026-11-02 ↗
Related
Host star
In everyday life
- Light from this object takes about 4.2 years to reach Earth — the light you see tonight left around AD 2022 (official distance ÷ speed of light).
- Its radius is about 1 times Earth's (NASA Exoplanet Archive).
- One orbit takes about 11.2 Earth days — that is this planet's year.
Worked out from this object's official values.