Speckle imagery of Jupiter taken at the Lick Observatory 120 inch telescope.



These two images show the site of impact G, comet Shoemaker-Levy 9, at

04:56 universal time (UT) and 05:48 UT, respectively, on July 19, 1994.



Impact G was the largest and most dramatic to date. At a wavelength of

550 nm, the impact point shows a dark core (approx 1.7 arc-sec in the

narrow dimension) surrounded by a ring-like feature (approx 4 arc-sec

in diameter). The dark core shows distinct sub-structure, and the ring

is brighter on one side than on the other.



In these images, the south pole is up and east is to the left, so that

the planet is rotating from left to right.



The imaging parameters were:



Wavelength:	550 nm

Bandwidth:	40 nm

Plate scale:	0.063 arc-sec/pixel

Size:		750 x 750 pixels (approx 47 arc-sec x 47 arc-sec)



Each of the two images was reconstructed from 40 individual

short-exposure speckle frames (exposure times of 200 ms and 300 ms,

respectively) via a bispectral speckle imaging algorithm.



Observers:



Claire Max, Don Gavel, Erik Johansson, LLNL

Mike Liu, UC Berkeley

Bill Bradford, UC Santa Cruz