This is a HAM Anim (playable by DPaintIV or equivalent) of the observed
impact of the first fragment from conet Shoemaker-Levy-9 on Jupiter.
It was derived from an original GIF image showing the sequence, published
by the South Africa Astrophysical Observatory on 17 July 1994.


SAAO Images of Fragment A Impact
********************************

In K-band (2.2 micron) infrared images obtained with the PtSi camera
mounted on the SAAO 0.75 m telescope at Sutherland, a bright fireball was
observed by Dr. Kaz Sekiguchi of SAAO. The fireball appeared at the
predicted location on the SE limb of Jupiter. The images were taken at 30
second intervals. The earliest faint signs of the fireball appear at about
20:17-20:18 UT, and at peak brightness it was comparable in brightness to
Io. After 10 minutes, the fireball image appears to change shape, becoming
elongated along the limb, presumably as the heated plume settles back. The
last traces along the limb are visible at least as late as 20:38 UT. The
rise in brightness is much faster than the decline.

The images are 30 sec exposures, at intervals of 1 minute, starting at 2017
UT, ending at 2032 UT. South is up and west is to the left. The bright moon
is Io, and the Great Red Spot is clearly visible on the surface of Jupiter.
The impact produced a flare which rapidly increased in brightness and
decayed slowly. This flare is probably from a plume of material which
becomes visible above the limb of Jupiter. Rotation probably plays little
part in the observed event.

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-rw-rw-r-- 20025/206    183569  205672  89.3% -lh5- 88dd Jul 19  1994 SL9_A.anim
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 Total         1 file   183569  205672  89.3%            Jul 19  1994