G 9-40 b
A confirmed exoplanet orbiting G 9-40.
Compared with Earth
- Size
- About 1.9 times Earth's width.
- Mass
- About 4 times Earth's mass.
- Temperature
- About 167 °C (333 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 6.3 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 5.7 Earth days.
Planet
- Radius
- 1.9 × Earth
- Mass
- 4 × Earth
- Density
- 3.2 g/cm³
- Equilibrium temperature
- 440.6 K
- Starlight received
- 6.27 × Earth
- Orbital period
- 5.746 days
- Average distance from its star
- 0.0418 AU
Star
- Host star
- G 9-40
- Spectral class
- M — red dwarf
- Surface temperature
- 3,395 K
- Radius
- 0.3026 × Sun
- Mass
- 0.2952 × Sun
- Age
- Unknown
System
- Distance from Earth
- 91.09 light-years (27.93 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2019
- Method
- Transit
- Facility
- K2
Data from the NASA Exoplanet Archive, synced October 14, 2026.