The Butterfly Nebula in Cygnus (IC 1318)
11:01 EDT, August 20, 2003 Starlight Express MX-916 with 3.5" Questar at f/5.5 using Ha filter.
PC-164C with 75mm C-mount lens and 2x Doubler as guide scope.
5.2 hours (in 0.2 hour autoguided increments)
Erosion sharpening.
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color version. With the mouse off the image area you should see
the Ha image.
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10:34 EDT, July 16, 2003
Starlight Express MX-916 with 3.5" Questar at f/5.5 using Ha filter.
PC-164C with 75mm C-mount lens and 2x Doubler as guide scope.
72 minutes (in 12 minute auto-guided increments)
Erosion sharpening and background smoothing.
