AP 130 EDF f/6, Nikon D600 H-alpha modified, 20 frames of 120 seconds each, no darks. I noticed satellite tracks in my stacked image... so faint that I missed them when I previewed the individual frames. Went back to delete the frame with the satellite tracks, and found that 12 out of 20 frames were tainted with Starlink stains. Thanks, Elon! I chose not to remove the frames to make a point... there is no better metaphor for the imprint that we humans are leaving on the earth and heavens.