17.4 micron 20.6 micron
These observations were part of a special daytime observing program carried out Dec 1-10 with the IRTF's NSFCAM at 5 microns and the guest instrument MIRAC2 at 4.8, 7.95, 8.57, 10.74, 13.3, 17.0, 17.4, and 20.6 microns. The telescope primary mirror was covered with a sheet of white polypropylene to protect it from direct radiation from the sun, which was 8 degrees from Jupiter during this period. This resulted in a reduction of signal-to-noise of a factor of 20 at 4.8 microns and 4 at 20 microns.
The observing was done by Jim Friedson, Jay Goguen, Glenn Orton, Sarah Stewart, and Padma Yanamandra-Fisher (JPL), John Spencer (Lowell Observatory), Bill Hoffmann (Steward Observatory), and Bill Golisch (telescope operator, IRTF), with support from Joseph Hora at the Institute for Astronomy and Joe Spitale and Jose Ortiz at JPL.
MIRAC2 was built by the Steward Observatory, University of Arizona, and Smithsonian Astrophysical Observatory, with support from NASA, NSF, Steward Observatory, and Smithsonian Astrophysical Observatory. It is operated by Bill Hoffmann, Giovanni Fazio, Joseph Hora, and Lynne Deutsch.