Kepler-221 is 1,257 light-years from the Sun. The NASA Exoplanet Archive lists 4 planets around this 5,243 K star; the first was found in 2014 by transit (Kepler).
Fly there in 3DKepler-221 b goes round its star every 2.80 days, 31 times as often as Mercury goes round the Sun.
| Surface temperature | 5,243 K |
| Mass | 0.854 solar masses |
| Radius | 0.821 solar radii |
| Luminosity | 0.3942 times the Sun |
| Apparent magnitude | 13.97 |
| Age | about 1.78 billion years |
| Distance from the Sun | 1256.5 light-years (385.2 parsecs) |
| Position (J2000) | RA 296.6547°, Dec 46.8352° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-221 b | 2.80 days | 0.0370 AU | 1.71 R⊕ | 5.9558 M⊕ | Transit, 2014 |
| Kepler-221 c | 5.69 days | 0.0590 AU | 2.93 R⊕ | 9.3 M⊕ | Transit, 2014 |
| Kepler-221 d | 10.0 days | 0.0870 AU | 2.73 R⊕ | 3.61 M⊕ | Transit, 2014 |
| Kepler-221 e | 18.4 days | 0.130 AU | 2.63 R⊕ | 7.8671 M⊕ | 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.