M81 – Cigar Galaxy

Now that I have been able to use my obsy with the permanently mounted telescope, I was able on my second outing to grab enough subs of the Cigar Galaxy to process into an LRGB image.As I was using my Astro-Tech 8″ Ritchey Chretien telescope with the Astro-Physics CCDT67 telecompressor working at 0.53X to make the focal length ~ 860mm and aperture F4.3. The ZWO ASI178MM-Cooled was imaging at Gain 200 with 3 minute subs for the Luminance, R, G & B images. I used the Astronomik CLS-CCD for the luminance images, and the Astronomik Deep Sky RGB filters, as these are supposed to work well together. In total I captured 12 frames of R, G and B images each, and 16 frames of Luminance. Total integration time was 2 hrs 36 minutes.

Image calibration, integration and processing was done using Pixinsight.

M82 LRGB image processed in Pixinsight
M82 LRGB image processed in Pixinsight
M82 100% crop
M82 100% crop

Now the stars are not completely round, as the seeing was not very good which did impact on the sub-pixel autoguiding using PHD2, and I was still working out the best settings for autoguiding with the Celestron CGEM. Hence I am sure I will be able to get much better images in future, particularly when I upgrade my mount.

Boon