I collected data for NGC 6946, a spiral galaxy in Cepheus, in July and again in September. The color data from July was very suspect and I did not like either version I produced at the time. I took more color data in September and added it to the mix. The final result is below. I like the color but if I go back to it I will stretch the luminance a bit more to bring out faint details in the extended area.

I did use Bob Franke’s eXcalibrator software to get the core color balance. It was very helpful.

Here is version 2. More stretched in the luminance, but the color I don’t particularly like.

Finally, version 1. I think you’ll agree the color and details here just don’t work very well.