HD 21749 c
A confirmed exoplanet orbiting GJ 143.
Compared with Earth
- Size
- About 89% of Earth's width.
- Mass
- About 3.7 times Earth's mass.
- Temperature
- About 428 °C (802 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 7.8 Earth days.
Planet
- Radius
- 0.892 × Earth
- Mass
- 3.7 × Earth
- Density
- 31.93 g/cm³
- Equilibrium temperature
- 701 K
- Starlight received
- Unknown
- Orbital period
- 7.79 days
- Average distance from its star
- 0.0695 AU
Star
- Host star
- GJ 143
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,640 K
- Radius
- 0.695 × Sun
- Mass
- 0.73 × Sun
- Age
- 3.8 billion years
System
- Distance from Earth
- 53.23 light-years (16.32 parsecs)
- Stars in system
- 1
- Known planets
- 2
Discovery
- Year
- 2019
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.