MIRSI performed its first scientific observations at the NASA IRTF during the period Oct. 30 - Nov. 8, 2002. Objects that MIRSI observed in both imaging and spectroscopic modes included the Orion, W3, and NGC 7538 star forming regions; planetary nebula NGC 7027; several near-Earth asteroids; and Jupiter, Callisto, and Io. Here are some images from that run. The pixel scale is 0.27'' per pixel; the field of view of a single image is 85'' by 64''. A more detailed description of the MIRSI instrument is presented in Deutsch et al. (2002, SPIE, 4841-13) (PDF | PS).
MIRSI mounted at the IRTF focus. Photo courtesy of Ed Tedesco.
Orion region mosaic: BNKL, Trapezium, and Orion bar
at 20 microns, with above detail of BNKL region at 20 microns.