Fragment N Impact on Jupiter

Nonaka Hidehiko: SL9 Fragment N ?            Wed, 20 Jul 1994 13:17

A friend of mine reported that the impact site of N ? fragment could
be observed clearly through a 3-inch refractor (FL,APO) as a spot
larger than the Great Red Spot.

Hidehiko NONAKA e8610@etlrips.etl.go.jp

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Graham Davies: sl9 observation - fragment N (Australia)      20 Jul 1994 12:15

Northern Districts Society for Amateur Astronomers Inc.
Various back-yard sites
Sydney NEW SOUTH WALES
AUSTRALIA

22:15 pm EST (12.15 UT) 20th July 1994

Fragment K's aftermath was on the limb at or about 20.20 EST (10.20 UT) 
when three independent observers (mostly at powers about 200x, scopes 
from 6 inches to 10 inches) saw a meteor-like pin-shaped flash above the 
site of the K-fragment blemish. These observations were assisted by the 
contrast at the darkened portion of the limb.

By about 20.45 EST (10.45 UT) the impact site of fragment N was clearly
visible and by 21.45 pm EST (11.45 UT) the site could be seen to be as
large as the K-fragment blemish, with a very similar structure - a central
hole and a scimitar-like smudge beneath it (to the south). The latitude is
slightly higher than the K-fragment site. When both sites were close to
the central meridian, the appearance was very like a pair of caricatured
and heavily browed eyes - 'the eyes of Jupiter' if the effect persists.
These latter observations were made with an 11 inch SCT, using a CCD video
camera and conventional real-time television display. I hope to examine
the video-tape at leisure at a more relaxed moment. The image diameter is 
approximately 8 inches on a 23 inch screen. Seeing degenerated as Jupiter 
moved lower in the sky, and is now less than 30 degrees.

Bad weather is predicted for Sydney on Friday, the day of fragment W's 
impact. Perhaps that will provide a little relief from the adrenaline 
overload. Hope everyone else is as thrilled by these events as my 
colleagues and myself. Momentous times indeed.

Graham Davies
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