JULY 21 5:30 UNIVERSAL TIME.
The image shows a three by three time sequence of frames from a movie which records the flash (frames 2 & 4) and fireball (frames 6 through 8) due to the impact of SL-9 fragment R on Jupiter. Time runs from left to right, and top to bottom. Each frame last for 4 seconds.
The images were observed in the infrared at a wavelength of 2.3 microns.
Photo credit: W. M. Keck Observatory/ Imke de Pater, James R. Graham, Garrett Jernigan UC-Berkeley.
For extra information contact: A. Perala, Keck Observatory,