HD 97658 b
A confirmed exoplanet orbiting HD 97658.
Compared with Earth
- Size
- About 2.1 times Earth's width.
- Mass
- About 8.3 times Earth's mass.
- Temperature
- About 478 °C (892 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 9.5 Earth days.
Planet
- Radius
- 2.12 × Earth
- Mass
- 8.3 × Earth
- Density
- 4.8 g/cm³
- Equilibrium temperature
- 751 K
- Starlight received
- Unknown
- Orbital period
- 9.49 days
- Average distance from its star
- Unknown
Star
- Host star
- HD 97658
- Spectral class
- K — orange dwarf
- Surface temperature
- 5,212 K
- Radius
- 0.728 × Sun
- Mass
- 0.85 × Sun
- Age
- 3.9 billion years
System
- Distance from Earth
- 70.33 light-years (21.56 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2010
- Method
- Radial Velocity
- Facility
- W. M. Keck Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.