m57
Object
M57 – The Ring Nebula in Lyra
Date & Location
11 October 2008 – Lovettsville, VA N 39° 16' 21" W 77° 38' 11"
Temperature ???, Seeing ??? -??? FWHM
Telescope
RCOS 14.5, F/8 on a Paramount ME MKS4000, Prime Focus, Image scale 0.61 arcsec/pixel
Camera
SBIG STL-11000M camera w/SBIG LRGB filters
Exposure Times
Luminance 1 hours (12 x 5 min.), binned 2x2, -15°C
- Red - 1 hour (12 x 5 min.), binned 2x2, -15°C
- Green - 1 hour (12 x 5 min.), binned 2x2, -15°C
- Blue - 1 hour (12 x 5 min.), binned 2x2, -15°C
Other Information
unguided: Protrack
Image acquisition and guiding – CCDAutoPilot 4 & MaxIm DL 5
Focus – RCOS TCC w/FocusMax
Image Processing
Master dark frame: 30 min (6 x 5 min.), sigma-reject combined
Dark and flat frame reduction in MaxIm DL 5
Luminance images combined in MaxIm DL 5
Color images average-combined in MaxIm DL 5
LRGB-combined in MaxIm DL 5
Post-Processing in Photoshop CS3