HR 8799 e
A confirmed exoplanet orbiting HR 8799.
Compared with Earth
- Size
- About 13 times Earth's width.
- Mass
- About 3,178 times Earth's mass.
- Temperature
- About 877 °C (1,610 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
Planet
- Radius
- 13.11 × Earth
- Mass
- 3,178 × Earth
- Density
- Unknown
- Equilibrium temperature
- 1,150 K
- Starlight received
- Unknown
- Orbital period
- Unknown
- Average distance from its star
- 16.4 AU
Star
- Host star
- HR 8799
- Spectral class
- A — white
- Surface temperature
- 7,400 K
- Radius
- Unknown
- Mass
- Unknown
- Age
- 0.03 billion years
System
- Distance from Earth
- 134.5 light-years (41.24 parsecs)
- Stars in system
- 1
- Known planets
- 4
Discovery
- Year
- 2010
- Method
- Imaging
- Facility
- W. M. Keck Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.