09-03 H-a Cressent (NGC6888)

H-a NGC6888 (North Up) (63% scale - 1,410K)	NGC6888 (North Up) (63% scale - 2,221K)
NGC6888 H-a in grayscale Stretched very hard used to create the Synthetic H-a colored image above left. (63% scale - 1,572K)

* * Technical Data * *

Date	H-a image 09-03-06, H-aRGB image 10-04-06
Exposure	H-a image: 2hrs40mins, 8x20mins, Bin 1x1 H-aRGB, 6hrs, H-a 9x20mins, RGB 6x10mins each, Bin 1x1
Mount	AP1200, 1999 #099
Optics	AP155EDFS, 1995 #95, f:7.26, FL=1126
Camera	SBIG STL-11000M, 1.65 arc.sec p/pixel, AstroDon I-Series HaRGB, -20C, DryAir Purge
Equipment	AP Field Flatener, FLI PDF, PreciseParts Adapters, TAK FS-78 FL=861 f:8.1 w/SBIG STL-Remote Guider, Bin-2, 4.83arc/sec p/pixel
Processing	MaximDL/CCD, Sigma Combine Pre-Beta 11, PhotoshopCS2, FITSplug by Eddie Trimarchi, AstroActions by Noel Carboni
Location	StarFields Observatory (SFO), Chiefland Astronomy Village, Florida, 29^d 24^m 26.34^s North, 82^h 51^m 31.26^s West
Comments	This is one of those images you never seem to be able to complete because of weather. I was only able to collect 40mins in H-a during August. I decided to play with Noel Carboni's AstroTools synthetic H-a color. It does a really nice job. Persistance pays off, after September's New Moon cycle and an unseasonal cool spell I captured the last 20mins in H-a and all the RGB's. The H-aRGB image was much more difficult to process.