The AU Mic System
AU Mic is a planetary system in the constellation Microscopium hosting 4 confirmed exoplanets, about 32 light-years from Earth.
Size Comparison: The Planets of AU Mic
Planets without a measured radius are not shown.
AU Mic: Star and Habitable Zone
AU Mic
- Spectral type
- M1 V
- Surface temperature
- 3,540 K (Sun: 5,772 K)
- Mass
- 0.64 M☉
- Radius
- 0.86 R☉
- Luminosity
- 0.1053 L☉
- Age
- 0.0 billion years (Sun: 4.6)
Habitable zone of AU Mic: 0.265–0.687 AU (conservative: 0.336–0.651 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
All 4 Planets in the AU Mic System
Discovery History
The first planet found here, AU Mic b, was discovered in 2020 using the transit method. The most recent addition, AU Mic e, followed in 2025.
Frequently Asked Questions About AU Mic
How many planets does AU Mic have?
AU Mic has 4 confirmed exoplanets. More may await discovery.
Are any planets in the AU Mic system habitable?
None of the known planets in AU Mic orbit within the star's habitable zone.
How far away is AU Mic?
AU Mic is about 32 light-years from Earth in the constellation Microscopium.
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