Impact Sites C, A, and E Observed in the Visible at Lick 
Observatory

This image show visible-wavelength speckle image 
reconstructions of Jupiter taken on July 18 1994 at 
04:29 UT. 

Dark spots are clearly visible at the impact locations 
of comet fragments C, A, and E (or, possibly, F), These 
spots can be seen in the top portion of the image (C on 
the left, E on the right). As shown, the images are in 
the same orientation as they were acquired, with the 
south pole up and east on the left. The spots are 
approximately 1 arc second in diameter, and impact 
sites A and E appear to have ring structures surrounding 
them. 

The image was taken with the following parameters: 
Wavelength:	550 nm
Bandwidth:	40 nm
Plate scale:	0.063 arc-sec/pixel
Size:		750 x 750 pixels (appx 47 arc-sec x 47 arc-sec)
Exposure time:	250 ms
No. of frames:	40

The images were processed using a speckle bispectral 
reconstruction algorithm. Each image shown combines the 
information from 40 short exposure frames taken over a 
total time of 2 minutes. 

Observers: 
Claire Max, Don Gavel, Erik Johansson, LLNL
Mike Liu, UC Berkeley
Bill Bradford, UC Santa Cruz