GJ 9827 b
A confirmed exoplanet orbiting GJ 9827.
Compared with Earth
- Size
- About 1.4 times Earth's width.
- Mass
- About 4.3 times Earth's mass.
- Temperature
- About 762 °C (1,403 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 1.2 Earth days.
Planet
- Radius
- 1.44 × Earth
- Mass
- 4.28 × Earth
- Density
- 7.858 g/cm³
- Equilibrium temperature
- 1,035 K
- Starlight received
- Unknown
- Orbital period
- 1.209 days
- Average distance from its star
- 0.0189 AU
Star
- Host star
- GJ 9827
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,236 K
- Radius
- 0.58 × Sun
- Mass
- 0.62 × Sun
- Age
- 5.465 billion years
System
- Distance from Earth
- 96.74 light-years (29.66 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2017
- Method
- Transit
- Facility
- K2
Data from the NASA Exoplanet Archive, synced October 14, 2026.