HD 197481       SAO 56680     HIP 102409
RA (J2000) = 20 45 09.5318      Dec (J2000) = -31 20 27.238
SpT = M1Ve    V = 8.65 mag    d = 9.9 pc
Proper Motion (mas/yr) =279.96 -360.61

After the disk around AU Microscopii (AU Mic) was first seen in the optical using a visible-light coronagraph at a telescope with mirror diameter 2.2 meters (88 inches), researchers obtained this high resolution images using adaptive optics at near-infrared wavelengths at Keck Observatory (10-meter telescope). This near-infrared image is composed of four different colors and has an angular resolution about 20 times sharper than the first optical image. The disk has a blue color throughout, and the farther out one looks the bluer the disk gets.

Basic facts about AU Mic:

1) Stellar Mass = 0.5 Msun, Stellar luminosity = 0.1 Lsun

2) Radius of Disk = 210 AU (21")

3) Radius of central depletion of dust = 17 AU

4) Age = 8-20 Million Year