• NGC 869 and NGC 884 in Perseus, the Double Cluster
    • NGC 869 and NGC 884 in Perseus, the Double Cluster
    Annotated image
  • NGC 869 and NGC 884, the Double Cluster in Perseus,
  • two open clusters, 7500 light years distant.
  • Hover over the picture for an annotated version
  • Date:  15 November 2023
  • FOV:  approximately 108' × 72'; the apparent size of the Double Cluster is about 60'
  • Telescope:  Stellarvue SVX102T + SFFX-1 flattener (714mm, f/7)
  • Guiding:  ZWO ASI120MM mini mono guide camera,
  • Stellarvue F050G 50mm guide scope
  • Computer:  ASIair pro Raspberry Pi
  • Mount:  iOptron CEM40
  • Camera:  ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 240
  • Resolution:  1.337 arcsec/pixel
  • Filter:  Baader Light Pollution Moonglow filter with IR cut
  • Stacking:  Forty-four 240 second frames using Pixinsight
  • Calibration:  20 darks, 20 flats, and 20 dark flats
  • Total Time:  2 hours 56 minutes
  • Processing:  Pixinsight – SPCC, DBE, BlurXT, NoiseXT, GHS + Sat, Scale
  • Location:  Darling Hill Observatory near Vesper, NY