HST

jay.respler@genie.com
Tue, 28 Nov 95 05:39:00 UTC 0000

This is a response that I got on GEnie, to a question from Mike about flares
from HST:



Category 2,  Topic 16
Message 303       Sun Nov 26, 1995
R.REEVES10                   at 10:44 EST

 Jay,
 I was not really watching the Hubble per se when I saw that happen.
 I was up at my observatory several years ago, I do not even remember the
 exact date.  I knew Hubble was making a high overhead pass that night
 and I was rummaging around inside getting things ready for the night's
 photo run.  The lights were all off and I was aligning the cross-hairs
 on the guide scope.  Part of this involves setting the intensity of
 illumination on the cross-hairs.  I looked down to the shelf on the
 pier of the telescope to reach the rheostat and I saw the carpet and
 a part of the wall get brighter.  My first thought was that this looks
 like it does when Venus shines inside the dome and lights up the
 wall, but I knew Venus was not the cause of this.  I looked up and saw
 Hubble was up like I expected it to be that night and it was VERY bright.
 It then faded back to normal and it continued its pass across the sky.
For it to have illuminated the wall like that, HST had to have reached at
least -4 mag for a second or so.  I don't know the exact phase angle, but the
 satellite was at least 50 to 60 degrees above the horizon when it happened
 and it was good and dark outside, no twilight left that would be throwing
 a glow on the wall.
 Robert

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(Bart, How would I send something via ftp for seesat-l archive?)


Jay.Respler@Genie.com
Freehold, New Jersey