Kepler-121 is 1,665 light-years from the Sun. The NASA Exoplanet Archive lists 2 planets around this 5,311 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-121 b goes round its star every 3.18 days, 28 times as often as Mercury goes round the Sun.
| Surface temperature | 5,311 K |
| Mass | 0.859 solar masses |
| Radius | 0.701 solar radii |
| Luminosity | 0.3358 times the Sun |
| Apparent magnitude | 14.904 |
| Age | about 0.5 billion years |
| Distance from the Sun | 1665.1 light-years (510.5 parsecs) |
| Position (J2000) | RA 286.1621°, Dec 39.6780° |
| Constellation | Lyra |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-121 b | 3.18 days | 0.0390 AU | 2.34 R⊕ | 6.08 M⊕ estimated | Transit, 2014 |
| Kepler-121 c | 41.0 days | 0.216 AU | 2.27 R⊕ | 5.77 M⊕ estimated | Transit, 2014 |
Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.