M101 is a grand design spiral galaxy that is 2/3 larger than our own Milky Way, spanning some 170 billion light years across. It is seen nearly face on from our perspective.
LUM = 48x10min
OSC = 58x10min
Total = 17hrs 40min
L=112x1min RGB=45x2min each
Total time = 6hrs 22min
This is my first LRGB image with a new camera (QHY163M). Processing done in PixInsight.
APM115 @ f/5.4 Riccardi .75x Reducer Atik 383L+ Losmandy G11 Gemini 2
Total time = 13.5hrs
Subs calibrated, registered and stacked with DeepSkyStacker Photoshop: levels/curves, smartsharpen filter, high pass filter, reduce noise filter, Gradient Xterminator
APM115 @ f/5.1 AP 27TVPH reducer
RGB=18x10min each Total time = 16.5hrs
Subs calibrated, registered and stacked with DeepSkyStacker Photoshop: levels/curves, smartsharpen filter, high pass filter, reduce noise filter, Gradient Xterminator This image is the first taken with an AP 27TVPH reducer, without a flattener. The stars have an irregular shape that I hope will be resolved with the addition of a field flattener.
AT8RC @ f/6.2 CCD67T Reducer Losmandy G11 guided with AT65EDQ, Lodestar, PHD Guiding
L=34x10min RGB=12x10min each