WISEP J121756.91+162640.2 A b
A confirmed exoplanet orbiting WISEP J121756.91+162640.2 A.
Compared with Earth
- Size
- About 10 times Earth's width.
- Mass
- About 6,992 times Earth's mass.
- Temperature
- About 177 °C (350 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
Planet
- Radius
- 10.47 × Earth
- Mass
- 6,992 × Earth
- Density
- Unknown
- Equilibrium temperature
- 450 K
- Starlight received
- Unknown
- Orbital period
- Unknown
- Average distance from its star
- 8 AU
Star
- Host star
- WISEP J121756.91+162640.2 A
- Spectral class
- Unknown
- Surface temperature
- 575 K
- Radius
- 0.091 × Sun
- Mass
- 0.029 × Sun
- Age
- 6 billion years
System
- Distance from Earth
- Unknown
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2012
- Method
- Imaging
- Facility
- W. M. Keck Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.