TOI-139 b
A confirmed exoplanet orbiting TOI-139.
Compared with Earth
- Size
- About 2.5 times Earth's width.
- Temperature
- About 288 °C (550 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 11 Earth days.
Planet
- Radius
- 2.457 × Earth
- Mass
- Unknown
- Density
- Unknown
- Equilibrium temperature
- 561.2 K
- Starlight received
- Unknown
- Orbital period
- 11.07 days
- Average distance from its star
- Unknown
Star
- Host star
- TOI-139
- Spectral class
- K — orange dwarf
- Surface temperature
- 4,570 K
- Radius
- 0.7007 × Sun
- Mass
- 0.69 × Sun
- Age
- Unknown
System
- Distance from Earth
- 138.3 light-years (42.41 parsecs)
- Stars in system
- 1
- Known planets
- 1
Discovery
- Year
- 2023
- Method
- Transit
- Facility
- Transiting Exoplanet Survey Satellite (TESS)
Data from the NASA Exoplanet Archive, synced October 14, 2026.