NGC 457 open cluster in Cassiopeia. NGC 436 is at upper right and nebula Sharpless 2-188 at left. Taken Nov 4, 2010 with 105mm A&M apo refractor at f/5 with Borg .85x flattener/reducer and Canon 5DMkII at ISO 800 for stack of 4 x 10 minute exposures, Median combined. Used Celestron CGEM mount and Sky-Watcher SynGuider on William Optics 66mm guidescope. All seemed to work well.
This is NGC 457, the ET or Owl Cluster in Cassiopeia, in a stack of images showing the total number of satellite trails recorded over the 36 minutes of total expposure time this night. By coincidence, the trails frame the main subject, but the number of satellites now above us make it nearly impossible to take a long exposure image, certainly at the start or end of a night, without recording at least one satellite trail, if not more, per image. Some of the parallel streaks could be Starlink satellites. This was from 51° north on a mid-October night, between 8:18 pm and 8:52 pm MDT. This is a stack of 12 x 3-minute exposures, stacked to add together, rather than average out, the trails. This was with the Starfield Géar90 apo refractor at f/4.8 with its Reducer/Flattener, and Canon Ra at ISO 1600.
