Kepler-81 is 1,136 light-years from the Sun. The NASA Exoplanet Archive lists 3 planets around this M0 V star; the first was found in 2012 by transit (Kepler).
Fly there in 3DKepler-81 b goes round its star every 5.96 days, 15 times as often as Mercury goes round the Sun.
| Spectral type | M0 V |
| Surface temperature | 4,385 K |
| Mass | 0.64 solar masses |
| Radius | 0.59 solar radii |
| Luminosity | 0.129 times the Sun |
| Apparent magnitude | 15.258 |
| Age | about 3.63 billion years |
| Distance from the Sun | 1136.0 light-years (348.3 parsecs) |
| Position (J2000) | RA 293.6369°, Dec 42.8248° |
| Constellation | Cygnus |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| Kepler-81 b | 5.96 days | 0.0522 AU | 2.42 R⊕ | 17.2 M⊕ | Transit, 2012 |
| Kepler-81 c | 12.0 days | 0.0835 AU | 2.37 R⊕ | 4.3 M⊕ | Transit, 2012 |
| Kepler-81 d | 20.8 days | 0.128 AU | 1.21 R⊕ | 1.92 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.