• Comet C2017 K2 PanSTARRS in Ophiuchus
    • C2017 K2
    Annotated
  • Comet C2017 K2 PanSTARRS in Ophiuchus made its closest
  • approach to Earth on 14 July 2022.  Here it is two days
  • later with much less moon but still near M10.
  • Hover over the picture for an annotated version
  • Date:  16 July 2022
  • FOV:  approximately 110' × 73'; the angular size of M10 is about 20'
  • Telescope:  Stellarvue SVX102T + SFFX-1 (714mm, f/7)
  • Guiding:  ZWO ASI120MM mini mono guide camera,
  • Stellarvue F050G 50mm guide scope
  • Computer:  ASIair pro Raspberry Pi
  • Mount:  iOptron CEM40
  • Pixel size:  4.78 μm
  • Resolution:  1.337 arcsec/pixel
  • Camera:  ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 240
  • Filter:  Baader Light Pollution Moonglow filter with IR cut
  • Stacking:  Nine 240 second frames, stars and comet aligned
  • separately using Pixinsight
  • Total Time:  36 minutes
  • Processing:  Pixinsight – Stars:  removed smeared comet using
  • StarXTerminator, SPCC, GHS
  • Comet:  CometAlign, StarXTerminator batch job, Image Integration,
  • ColorCalibration, DBE, NoiseXT, GHS
  • PixelMath ~(~Stars*~Comet) to combine Comet and Stars
  • Location:  Darling Hill Observatory in Vesper, NY