:INFO
Ice giant around AU Mic
It is 4.79 times Earth's radius, closest in size to Uranus, and 9.0 times Earth's mass, at 0.49 g/cm3, less dense than Earth. A year there lasts 8.46 days, on an orbit 6 times closer to its star than Mercury is to the Sun. Its equilibrium temperature is 555 K, hotter than any desert. The host star AU Mic runs at 3540 K with 0.64 times the Sun's mass.

:STATS
[icon:TARGET] Radius | 4.79 Earth radii
[icon:CHART] Mass | 9.0 Earth masses
[icon:FIRE] Equilibrium temperature | 555 K (measured)
[icon:CLOCK] One year | 8.46 days
[icon:BOLT] Orbit radius | 0.0700 AU
[icon:STAR] Host star | AU Mic at 3540 K
[icon:USERS] Distance | 32 light-years
[icon:TRENDING_DOWN] Starlight blocked | 0.259% at each transit

:TIMELINE
🔭🪐📅
2020-01-01 | AU Mic b
2021-01-01 | AU Mic c

:PATH
What a crossing measures
The depth of the dip is the ratio of the two discs, so the radius follows.

:NOTE
AU Mic has 4 known planets. Planets in company tug on each other, and those tugs are measurable, which is how masses get pinned down without a wobble.

:NOTE
Found by Transiting Exoplanet Survey Satellite (TESS) in 2020. TESS scans most of the sky in 27-day stretches, so it favours bright nearby stars and short orbits over the faint distant ones Kepler specialised in.

:NOTE
Two independent measurements sit behind this page: a dip in starlight for the size, and something else entirely for the mass. Together they make a density.

:LINK
https://exoplanetarchive.ipac.caltech.edu/overview/AU%20Mic%20b
NASA Exoplanet Archive: the full record for AU Mic b