• NGC 6405, the Butterfly Cluster in Scorpius (M6)
    • M6, the Butterfly Cluster
    Annotated image
  • NGC 6405, M6 the Butterfly Cluster,
  • is an open cluster of stars in Scorpius.
  • Date:  29 May 2022 and 24 June 2022
  • FOV:  approximately 110' × 73'; the angular size of M6 is about 25'
  • 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
  • Camera:  ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 240
  • Filter:  Baader Light Pollution Moonglow filter with IR cut (10 frames)
  • and Optolong L-eNhance narrow dual band (13 frames)
  • Stacking:  Twenty-three 240 second frames using Deep Sky Stacker
  • Total Time:  1 hour 32 minutes
  • Processing:  Pixinsight – SPCC, DBE, BlurXT, NoiseXT, GHS, HST, MskStr,
  • PixelMath sum, HDR3, Sat, Scale
  • Location:  Darling Hill Observatory in Vesper, NY