YZ Cet b
A confirmed exoplanet orbiting YZ Cet.
Compared with Earth
- Mass
- About 70% of Earth's mass.
- Temperature
- About 198 °C (388 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 8.2 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 2 Earth days.
Planet
- Radius
- Unknown
- Mass
- 0.7 × Earth
- Density
- Unknown
- Equilibrium temperature
- 471.2 K
- Starlight received
- 8.21 × Earth
- Orbital period
- 2.021 days
- Average distance from its star
- 0.01634 AU
Star
- Host star
- YZ Cet
- Spectral class
- M — red dwarf
- Surface temperature
- 3,151 K
- Radius
- 0.157 × Sun
- Mass
- 0.142 × Sun
- Age
- 3.8 billion years
System
- Distance from Earth
- 12.11 light-years (3.712 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2017
- Method
- Radial Velocity
- Facility
- La Silla Observatory
Data from the NASA Exoplanet Archive, synced October 14, 2026.