K2-3 d
A confirmed exoplanet orbiting K2-3.
Compared with Earth
- Size
- About 1.5 times Earth's width.
- Mass
- About 2.2 times Earth's mass.
- Temperature
- About 32 °C (90 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 1.4 times the starlight Earth gets from the Sun.
- Year
- A year here lasts about 45 Earth days.
Planet
- Radius
- 1.458 × Earth
- Mass
- 2.2 × Earth
- Density
- Unknown
- Equilibrium temperature
- 305.2 K
- Starlight received
- 1.44 × Earth
- Orbital period
- 44.56 days
- Average distance from its star
- 0.2014 AU
Star
- Host star
- K2-3
- Spectral class
- M — red dwarf
- Surface temperature
- 3,844 K
- Radius
- 0.546 × Sun
- Mass
- 0.549 × Sun
- Age
- 6.9 billion years
System
- Distance from Earth
- 143.7 light-years (44.07 parsecs)
- Stars in system
- 1
- Known planets
- 3
Discovery
- Year
- 2015
- Method
- Transit
- Facility
- K2
Data from the NASA Exoplanet Archive, synced October 14, 2026.