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Tuesday, October 16, 2012
Finally, after waiting four weeks for a clear night, I was able to finalize this project last night by shooting the missing S-II channel (light from the ionized Sulfur)
IC 1340, Part of the Eastern Veil Nebula in Cygnus
RA: 20h56m 45.8s DE:+31 degrees07' 17"
Note. an apparent size of the Moon is at lower Right corner.
The area of interest is shown with a rectangle and the size of the Moon with a circle.
Image in visual spectrum from the same material
R=Hydrogen + Sulfur, G=Oxygen and B=Oxygen + Hydrogen.
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.
Optics, Meade LX200 GPS 12" @ f5
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera
Image Scale, ~0,8 arc-seconds/pixel
16 x 1200s exposures for H-alpha emission = 5h 20min.
12 x 1200s exposures for O-III, emission of ionized Oxygen = 4h
12 x 1200s exposures for S-II, emission of ionized Sulfur = 4h
Total exposure time 13h 20min.
Stars vs starless animation
Soetimes it's easier to see deatils in the nebula, if the stars are removed.