[SII] = Red, Ha, Green, [OIII] = Blue
Click image for medium resolution, click here for larger, for highest resolution, click here
This image was selected for the cover art on the graduate-level textbook: "From Dust to Stars" by Dr. Norbert Schulz of MIT
Taken on August 27, 28, 30, 31 and Sept 1 - 4, 2004 from my backyard in Castro Valley, California
Takahashi FSQ106 f/5 (F=530mm) imaging scope
Finger Lakes IMG6303E imaging camera at -35C
AP80/900MM guide scope
SBIG ST7E guide camera at -15C
Finger Lakes CFW1 filter wheel
AP900GTO mount
Finger Lakes DF2 Focuser
Custom Scientific 50mm Narrowband Emission Line filters (AR Coated)
Sulfur II 673.4nm 3nm FWHM
Hydrogen alpha 656.3nm 3nm FWHM
Oxygen III 500.7nm 3nm FWHM
12 exposures of 10 minutes at each of two aiming sites for Halpha
15 exposures of 15 minutes at each of two aiming sites for [OIII]
13 exposures of 15 minutes at each of two aiming sites for [SII]
18 hours total exposure time