Great Cluster in Hercules
This time though, I just wanted to show a quick couple of pictures I took a couple of days ago of the Great Cluster in Hercules, or M13 as you might know it. Perhaps one of the most famouse of the globular clusters, it's a popular target for visual and photography.
The night was forecast to be clear for quite a long time, so I didn't rush into taking the picture, instead trying to teach myself the arts of perfect polar alignment and drift alignment. It did mean though that it was gone 1am before I actually got around to taking any pictures.
In the end, I took 20 light frames of 45 seconds each at ISO 1600, then stacked them with 10 dark frames and 10 bias frames. The first attempt at processing was OK, but I did think I could get a bit more out of it with a bit more time.
The first image is the result of the first set of processing. Version 2 of the image then shows a little more detail and sharper detail. I've also cropped it a little better. Enjoy, and check back soon to see what else I've been up to in the astronomy hobby recently.