I then added the 80 frames I got to the ones I took last year. In this way I obtained a total of 100 frames (1 min each) and this is the resulting combined image:
M 63 Sunflower Galaxy
Modded Canon EOS 1100D at the prime focus of C8 (tracking not guided)
100x60 sec frames , 30 dark , ISO 800
stacked with DSS and processed with Gimp