Ring Nebula, M57
Copyright © 2011
M57, Ring Nebula in the constellation Lyra, NGC 6720
Distance: 2300 light years.
Size: 0.9 light years across
Camera: SBIG ST-2000XM
Telescope: Astrophysics Starfire 140 EDT F7.5
Mount: Astro-Physics Mach1 GTO with Advanced Telescope Systems portable pier
Images: 24 sub images @ 5 minutes each of 6 clear, 6 red, 6 green, and 6 blue for a total exposure time of 2 hours.
Date: May 28, 2008
Software: Camera, mount, and guider control - CCD Commander & MaximDL, calibration and stacking - CDStack, further processing in Photoshop CS2.