HR 8799 d
A confirmed exoplanet orbiting HR 8799.
Compared with Earth
- Size
- About 13 times Earth's width.
- Mass
- About 3,000 times Earth's mass.
- Year
- A year here lasts about 101 Earth years.
Planet
- Radius
- 13 × Earth
- Mass
- 3,000 × Earth
- Density
- Unknown
- Equilibrium temperature
- Unknown
- Starlight received
- Unknown
- Orbital period
- 37,000 days
- Average distance from its star
- 24 AU
Star
- Host star
- HR 8799
- Spectral class
- Unknown
- Surface temperature
- Unknown
- Radius
- Unknown
- Mass
- 1.5 × Sun
- Age
- 0.06 billion years
System
- Distance from Earth
- 134.5 light-years (41.24 parsecs)
- Stars in system
- 1
- Known planets
- 4
Discovery
- Year
- 2008
- Method
- Imaging
- Facility
- W. M. Keck Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.