HD 187123 b
A confirmed exoplanet orbiting HD 187123.
Compared with Earth
- Mass
- About 166 times Earth's mass.
- Year
- A year here lasts about 3.1 Earth days.
Planet
- Radius
- Unknown
- Mass
- 166.2 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 3.097 days
- Average distance from its star
- 0.0426 AU
Star
- Host star
- HD 187123
- Spectral class
- G — sun-like
- Surface temperature
- 5,790 K
- Radius
- 1.15 × Sun
- Mass
- 1.04 × Sun
- Age
- Unknown
System
- Distance from Earth
- 149.9 light-years (45.95 parsecs)
- Stars in system
- 1
- Known planets
- 2
Discovery
- Year
- 1998
- Method
- Radial Velocity
- Facility
- W. M. Keck Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.