Astronomical evidence
AU Mic is a young, magnetically active red dwarf surrounded by a debris disk. TESS and Spitzer identified AU Mic b through transits, while stellar spots and flares complicate the light curve. [1,2] The saved catalog period is 8.463446 days. Starspots and the drawn prominence evoke that activity; they do not reproduce an observed map of the star or a measured eruption. A debris disk is composed of material distributed over a vast volume, not a dense bridge of nearby boulders.
The illustrated viewpoint
Charcoal humanoid with backward head fins in a seiza with separate open hands on thighs. Obsidian plain beside a painted lava-rock shelter. The moon and its stability are unverified. Ground, warrior, cave art, exposed survival and local weather are invented. Stellar scale, visible prominence, reddish exposure, rendered individual debris pieces and simultaneous star visibility are exaggerated. This serene pose does not imply benign irradiation or a habitable climate.
The moon and its stability are unverified. Ground, warrior, cave art, exposed survival and local weather are invented. Stellar scale, visible prominence, reddish exposure, rendered individual debris pieces and simultaneous star visibility are exaggerated. This serene pose does not imply benign irradiation or a habitable climate. All warriors and cultures are fictional. Peace and strength are visual themes; no character thoughts, teachings or biological cosmic-energy mechanism are supplied.
Catalog measurements & sources
Host: AU Mic. Snapshot: 25 September 2026. Errors, limits and source provenance are retained. Calculated values and model estimates are not direct measurements. Unknown is not zero; equilibrium temperature is not surface temperature.
| Quantity / unit | Value / reported errors | Source |
|---|---|---|
| Radius · Earth radii | 4.79 (+0.29 / -0.29) | Mallorquín et al. 2024 |
| Mass · Earth masses | 8.99 (+2.61 / -2.67) | Mallorquín et al. 2024 |
| Density · g/cm³ | 0.49 (+0.16 / -0.16) | Mallorquín et al. 2024 |
| Orbital period · days | 8.46345 (+5e-06 / -5e-06) | Mallorquín et al. 2024 |
| Orbital semimajor axis · AU | 0.07 (+0.006 / -0.007) | Mallorquín et al. 2024 |
| Eccentricity | 0.07 (+0.09 / -0.04) | Mallorquín et al. 2024 |
| Inclination · degrees | 88.39 (+0.2 / -0.23) | Mallorquín et al. 2024 |
| Irradiation · Earth flux | 21.2 (+2.5 / -2.4) | Wittrock et al. 2023 |
| Equilibrium temperature · K | 554.8 (+31.6 / -32) | Mallorquín et al. 2024 |
| Stellar effective temperature · K | 3540 (+120 / -110) | Mallorquín et al. 2024 |
| Stellar radius · Solar | 0.862 (+0.052 / -0.052) | Mallorquín et al. 2024 |
| Stellar mass · Solar | 0.635 (+0.04 / -0.07) | Mallorquín et al. 2024 |
| Stellar luminosity · log Solar | -0.97757 (+0.00574 / -0.00581) | Mallorquín et al. 2024 |
| Stellar age · Gyr | 0.019 (+0.01 / -0.006) | Mallorquín et al. 2024 |
| Stellar metallicity · dex | 0.01 (+0.06 / -0.06) | Mallorquín et al. 2024 |
| Distance · pc | 9.7221 (+0.004625 / -0.004625) | TICv8 |