Equipment: ============ Scope: SkyWatcher Esprit 80 triplet APO Mount: SkyWatcher AZ-EQ6 Field Flatener: SkyWatcher Esprit 80 field flatener Guide Scope: SkyWatcher EvoGuide 50ED Camera: Canon EOS 600D (unmodified) Filters: - Guide Camera: QHY5L-II-C Other Gear: StarSharp Bahtinov mask Pegasus Astro FlatMaster HitecAstro manual 4ch dew controller AstroZap dew straps PowerSonic 69Ah AGM deep cycle battery Orico 4 port powered USB3 hub (accepts 12V input) Unitek Y-3015 active 5m USB3 extension Thinkpad T470 with 72Wh+24Wh batteries TEMPer USB temperature sensor (poor accuracy but better than nothing) Software: APT (capture) PHD2 (guiding) SharpCap Pro (polar alignment) DeepSkyStacker (stacking) StarTools (processing) eqmod 2020-05-16 60 good exposures, 15 dark frames, 30 flats 2020-05-21 58 good exposures, 15 dark frames, 30 flats 2020-05-22 72 good exposures, 15 dark frames, 30 flats 2020-05-23 30 bias frames Issues with this image: * More darks would be good. Current number is due to limited battery life (max 75x 2m exposures on a charge after time taken for flats and occasional refocusing) * Brigher stars are blown out. Need to reduce exposure length next time Other challenges: * Camera disconnected twice on the 22nd resulting in fewer than expected exposures on the second battery charge. USB cable cable has been replaced to see if that was the cause. * Air was a bit hazy late on the 22nd (really around 1am on the 23rd) due to light fog so fewer of these exposures were kept * Automatic Meridian Flip failed at 7pm on the 22nd which caused some delays. Things to do differently next time: * Check histogram and image max pixel value to ensure nothing is clipping. Reduce exposure time as necessary * Adjust eqmod limits and APT automatic meridian flip settings to see if we can get this to happen successfully.