Kepler-1661 b
A confirmed exoplanet orbiting Kepler-1661.
Compared with Earth
- Size
- About 3.9 times Earth's width.
- Mass
- About 17 times Earth's mass.
- Temperature
- About -30 °C (-22 °F) from starlight alone, against -18 °C (-1 °F) for Earth measured the same way.
- Starlight
- About 88% of the starlight Earth gets from the Sun.
- Year
- A year here lasts about 175 Earth days.
Planet
- Radius
- 3.87 × Earth
- Mass
- 17 × Earth
- Density
- 1.6 g/cm³
- Equilibrium temperature
- 243 K
- Starlight received
- 0.88 × Earth
- Orbital period
- 175.1 days
- Average distance from its star
- 0.633 AU
Star
- Host star
- Kepler-1661
- Spectral class
- K — orange dwarf
- Surface temperature
- 5,100 K
- Radius
- 0.762 × Sun
- Mass
- 0.841 × Sun
- Age
- 2 billion years
System
- Distance from Earth
- 1,339 light-years (410.6 parsecs)
- Stars in system
- 2
- Known planets
- 1
Discovery
- Year
- 2020
- Method
- Transit
- Facility
- Kepler
Data from the NASA Exoplanet Archive, synced October 14, 2026.