Cool image Paul.
Hale Bopp has a very special place in my heart - it was the first bright comet
I got to share with large crowds. I hadn't done much outreach until about 1995
and when this comet started getting noticed by the public we were attracting
crowds of 1,000 plus at events that usually averaged 20-30 people tops. It was
really amazing.
Ted Forte
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx <az-observing-bounce@xxxxxxxxxxxxx> On
Behalf Of Paul Lind
Sent: Saturday, March 14, 2020 11:08 PM
To: az-observing <az-observing@xxxxxxxxxxxxx>
Subject: [AZ-Observing] Mining Old Silver
Years ago one of the astronomy magazines (?) used this title to describe
"recent" data recovery from archived B&W observatory plates. That article came
to mind after I found some of my lost 1997 color negatives of comet Hale-Bopp.
These showed little color and no ion tail in the commercial print on my wall.
Coincidentally, my doctor told me to avoid heavy lifting after my recent
successful back surgery, and that's offered wonderful opportunities to do light
work. Since 1997 I had acquired an Epson large format negative scanner. The
film was 6 x 7 cm PPF-2 hypered film. Two of the processed images show a nice
blue ion tail and can be seen at:
https://pbase.com/paullind/fast_moving_objects
I'll check the exposure data later, but the camera was my original 8 inch f/3.6
hyperbolic astrograph (1996) with hypered Kodak PPF-2 6x7 cm color negative
roll film on a vacuum back. Exposures were about 5 minutes. Corner-corner
images span about 4 degrees (see vignetting in one of the images) .
Paul Lind
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