NGC21170 HaRGB  (North Top)   (~50% Crop -> 800K )
*   *     Technical Data     *   *
Date 01-07 through 02-10-08
Exposure 9.9hrs total, H-a= 3.5hrs 7x30mins, G2V RGB, R= 125mins 12x626sec, G= 120mins 12x600sec, B= 140mins 12x702sec, Bin 1x1.
Optics 1995 AP155EDFS #95, f:7.26, FL=1126
Mount 2007 AP1200 GTOCP3 #714
Camera 2005 SBIG STL-11000M, 1.65 arc.sec p/pixel @ -20C, AstroDon I-Series HaRGB.
Guider 2006 SBIG STL-Remote w/Red filter, TAK FS-78, FL-632mm f:8.1.
Equipment AP Field Flatener, FeatherTouch FTF-3545 & Digital MicroFocuser, PreciseParts Adapters.
Custom built Water Cooling and DryAir Purge Systems
Processing MaximDL/CCD w/Russ Crowman's Sigma Combine Plug-In, PhotoshopCS2,  FITSplug by Eddie Trimarchi, AstroActions by Noel Carboni
Location StarFields Observatory (SFO), Chiefland Astronomy Village, Florida,   29d 24m 26.34s  North,   82h 51m 31.26s   West
Comments ... Fought bad weather, reshot RGB channels 3-4 times due to poor Seeing.
... G2V weights used for exposures, no Combine Compensation.

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