Iris Nebula, NGC 7023
Copyright © 2011
Iris Nebula, NGC 7023. A cloud of interstellar dust and gas in the constellation Cepheus.
Distance: 1300 light years
Size: 6 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: 63 subexposures of 10 minutes each with 12 luminance, 20 red, 16 green, and 15 blue for a
total of 16 hours and 40 minutes.
Date: September 2009
Software: Camera, mount, and guider control - CCD Commander & MaximDL, calibration and stacking - CCDStack, further processing in Photoshop CS4.