Crab Nebula, M1 in CFHT Palette
Copyright © 2011
M1, Crab Nebula, Supernova remnant, SNR, in the constellation Taurus.
The Chinese observed this in 1054 AD and was evident to the Anasazi Indians. It was visible for 23 days in daylight and 653 days as a naked eye object at night.
Distance: 6500 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: Using the CFHT palette the exposure was 61 sub images @ 15 minutes each of 21 Ha, 19 OIII, and 21 SII for a total exposure time of 15 hours and 15 minutes.
Date: January 2009
Software: Camera, mount, and guider control - CCD Commander & MaximDL, calibration and stacking - CCDStack, further processing in Photoshop CS4.