Horsehead NGC 6946 Horsehead

(Click on image for Full Resolution)

(Click here for my first attempt - Vixen 102F/ST-237 on 09/17/2001)

Date: August 20, 2005
Exposure: LRGB: 180:120:150:165
36 x 300s L, 8 x 900s R, 10 x 900s G, 11 x 900s B
Processing: CCDAutoPilot2 in control for all images - CCDSoftV5 for image acquisition. MaxIm for image calibration,(5 each RGB flats, bias subtracted and median combined, 60 bias frames median combined, 20-900s darks Sigma Reject combined), alignment, normalization, stretch, and RGB combine. 2 iterations of CCDSharp on the Luminance layer. Photoshop CS for RGB processing,final adjustment and jpg conversion.
Conditions: Good to variable, clear with nice transparency and low humidity (60-70%) Mag 4-5 Skies
Scope: RCOS 16" Truss @ f/6
Camera: ST-10XME/CFW-8A -10°
Comments: Taken over multiple nights starting on August 20th and ending on September 26th. This tested my endurance as my camera misbehaved, and CCDSoftV5 developed an anomaly in guiding which was fixed by removing completely and reinstalling. Many nights I would get started only to find clouds rolling in less than 1 hour later. But through all of this, the technology let me reposition the scope so my exposures lined up very well after all the different nights I imaged and I am very happy with the results :-))