From spencer@lowell.edu Sat Mar  4 00:24:10 1995
From spencer@lowell.edu Sat Mar  4 00:24:10 1995
From: spencer@lowell.edu (John R. Spencer)
Date: Sat, 4 Mar 95 00:23:19 MST
To: oleroemer@lowell.edu
Subject: More on Io outburst
Cc: spencer@lowell.edu
Content-Length: 877
X-Lines: 21
Status: RO


Bad weather today has given me a chance to look more closely
at the images of the 18:00 UT 1995/03/02 Io outburst, in order
to find its location on the satellite.  Eyeball fitting of the
limb of Io in one of the best images to get the location of
the center of the disk relative to the hot spot gives an improved
estimate of the location of something like 45 S, 95 W, with
an estimated uncertainty of +/- 15 degrees.  This is in a
dark region East of Bactria Regio, which has a couple of dark
calderas in it but is fairly unremarkable.

The spot will again be visible tonight (3/4 UT) but weather is
still bad at Mauna Kea so hopefully someone else can take a
look for this feature: we will be lucky if we can observe it
tonight.

In the L (3.5 micron) filter, the spot is comparable in brightness
to Io's total sunlit disk, but I haven't done accurate photometry
yet.

John.