[APML] 10 frame Rosette Mosaic

["Bobby Middleton" <bobm@koyote.com>]

Hello all. I've finally posted my "winter project" for this season. It's a
10 frame (yep; ten) mosaic of the Rosette nebula. I was able to oevrcome the
frame warping difficulties that kept me from going past 5 or 6 frames on my
previous projects by registering the central 3-4 frames with Registar on top
of a wide-field image; then building the additional single frames on top of
that. I still had some warping but I believe one can take the image at
whatever stage and re-register it on a widefield image to get things back to
linear alignment. It's here:
http://www.koyote.com/users/bobm/rosette2.htm
All 10 frames are composites of two 60 min exposures on hypered Kodak LE 400
film.
I posted a high-res crop of this to the AP users group about 2 weeks ago for
comparison with CCD images made with two different wide-field instruments.
The high-res central crop from my 12.5" f/7 newt is on the page below along
with an identical crop from Ray Gralak's AP 105 st-8 Ha image and Mark
Jenkin's Ha image from a 9.25" Mak-newt with a FLI CCD camera. Those
comparisons are at the link below if anyone is interested in resolution
comparisons of film and CCD cameras. The fewer stars from the CCD images are
a result of the Ha filter.
http://www.bigcigarastronomy.com/Rosette-Comparison2.jpg
Bobby Middleton






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