CCD imaging at Perth observatory of Io, Europa, and the limb of Jupiter with a duty cycle of only about 30% did not reveal any obvious flashes associated with the impact of fragment D. Photometric analysis will be required to remove large scintillation effects.
We observed the plumes of C and D with Near-IR camera attached to 188cm telescope at Okayama Astrophysical Observatory, National Astronomical Observatory of Japan.
Thermal plume of C appeared 07:17 UT on July 17 on 2.36 micron images. It was the brightest around 07:21. The decay phase was observed over one hour. Thermal plume of D appeared 12:01 UT on July 17, but it is fainter than that of C.
J. Watanabe, T. Yamashita, H. Hasegawa, S. Takeuchi, M. Abe, Y. Hirota, E. Nishihara, A. Mori, S. Okumura,