K2-99 b
A confirmed exoplanet orbiting K2-99.
Compared with Earth
- Size
- About 12 times Earth's width.
- Mass
- About 277 times Earth's mass.
- Temperature
- About 911 °C (1,672 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Year
- A year here lasts about 18 Earth days.
Planet
- Radius
- 11.88 × Earth
- Mass
- 276.5 × Earth
- Density
- Unknown
- Equilibrium temperature
- 1,184 K
- Starlight received
- Unknown
- Orbital period
- 18.25 days
- Average distance from its star
- 0.153 AU
Star
- Host star
- K2-99
- Spectral class
- F — yellow-white
- Surface temperature
- 6,069 K
- Radius
- 2.55 × Sun
- Mass
- 1.44 × Sun
- Age
- 3.7 billion years
System
- Distance from Earth
- 1,693 light-years (519.2 parsecs)
- Stars in system
- 1
- Known planets
- 2
Discovery
- Year
- 2016
- Method
- Transit
- Facility
- K2
Data from the NASA Exoplanet Archive, synced October 14, 2026.