HD 191939 c
A confirmed exoplanet orbiting HD 191939.
Compared with Earth
- Size
- About 3.2 times Earth's width.
- Mass
- About 8 times Earth's mass.
- Temperature
- About 327 °C (620 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 21 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 29 Earth days.
Planet
- Radius
- 3.195 × Earth
- Mass
- 8 × Earth
- Density
- 1.35 g/cm³
- Equilibrium temperature
- 600 K
- Starlight received
- 21 × Earth
- Orbital period
- 28.58 days
- Average distance from its star
- 0.1752 AU
Star
- Host star
- HD 191939
- Spectral class
- G — sun-like
- Surface temperature
- 5,348 K
- Radius
- 0.94 × Sun
- Mass
- 0.81 × Sun
- Age
- 8.7 billion years
System
- Distance from Earth
- 174.8 light-years (53.61 parsecs)
- Stars in system
- 1
- Known planets
- 6
Discovery
- Year
- 2020
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.