AU Mic is 31.7 light-years from the Sun. The NASA Exoplanet Archive lists 4 planets around this M1 V star; the first was found in 2020 by transit (Transiting Exoplanet Survey Satellite (TESS)).
Fly there in 3DAU Mic b goes round its star every 8.46 days, 10 times as often as Mercury goes round the Sun.
Where the archive gives only a period or only an orbit size, the other is worked out from Kepler’s third law with the star’s mass.
| Spectral type | M1 V |
| Surface temperature | 3,540 K |
| Mass | 0.635 solar masses |
| Radius | 0.862 solar radii |
| Luminosity | 0.1053 times the Sun |
| Apparent magnitude | 8.81 |
| Age | about 0.019 billion years |
| Distance from the Sun | 31.7 light-years (9.7 parsecs) |
| Position (J2000) | RA 311.2911°, Dec -31.3424° |
| Constellation | Microscopium |
| Planet | Year | Orbit | Radius | Mass | Found |
|---|---|---|---|---|---|
| AU Mic d | 12.7 days | 0.0917 AU from Kepler’s law | 1.02 R⊕ estimated | 1.053 M⊕ | Transit Timing Variations, 2023 |
| AU Mic e disputed | 33.1 days | 0.173 AU from Kepler’s law | 4.87 R⊕ estimated | 21.1 M⊕ | Radial Velocity, 2025 |
| AU Mic b | 8.46 days | 0.0700 AU | 4.79 R⊕ | 8.99 M⊕ | Transit, 2020 |
| AU Mic c | 18.9 days | 0.119 AU | 2.79 R⊕ | 14.46 M⊕ | Transit, 2021 |
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.