Qatar-9 b
A confirmed exoplanet orbiting Qatar-9.
Compared with Earth
- Size
- About 11 times Earth's width.
- Mass
- About 378 times Earth's mass.
- Temperature
- About 861 °C (1,582 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 1.5 Earth days.
Planet
- Radius
- 11.31 × Earth
- Mass
- 378.2 × Earth
- Density
- 1.43 g/cm³
- Equilibrium temperature
- 1,134 K
- Starlight received
- Unknown
- Orbital period
- 1.541 days
- Average distance from its star
- 0.0234 AU
Star
- Host star
- Qatar-9
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,309 K
- Radius
- 0.696 × Sun
- Mass
- 0.719 × Sun
- Age
- 7.5 billion years
System
- Distance from Earth
- 697.2 light-years (213.8 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2019
- Method
- Transit
- Facility
- Qatar
Data from the NASA Exoplanet Archive, synced October 14, 2026.