• NGC 6341 or Messier 92, a globular in Hercules
    • M92 globular
    M92
  • NGC 7341, M92, is a small but bright globular
  • cluster located in the constellation Hercules.
  • Easily seen in small telescopes, it is often
  • overlooked due to its proximity to M13.
  • It contains 330 000 stars and
  • is 26.7 kly from us.
  • Hover over the picture for an annotated version
  • Date:  24 and 26 April 2024 and 19 May 2024
  • FOV:  approximately 45' × 30'; the apparent size of M92 is about 14'
  • Telescope:  Orion 127mm Mak-Cass (1381mm, nominally 1540mm, f/12.1)
  • Guiding:  ZWO ASI120MM mini mono guide camera,
  • SVBony SV165 Mini 40mm f/4 guide scope
  • Computer:  ASIair pro Raspberry Pi
  • Mount:  iOptron CEM40
  • Session 1 and 2:  24 and 27 April 2024
  • Camera:  ZWO ASI071MC Pro Cooled (-10°C) Color CMOS with gain 90
  • Pixel size:  4.78 μm
  • Resolution:  0.714 arcsec/pixel
  • Filter:  none
  • Session 3:  19 May 2024
  • Camera:  ZWO ASI6200MC Pro Cooled (-10°C) Color CMOS with gain 100
  • Pixel size:  3.76 μm
  • Resolution:  0.519 arcsec/pixel
  • Filter:  none
  • Stacking:  seventy-six 240 second frames using Pixinsight
  • 11 frames 24 April 2024
  • 9 frames 26 April 2024
  • 56 frames 19 May 2024
  • Calibration:  20 flats, 20 dark flats, and 20 darks each session
  • Total Time:  5 hours 4 minutes
  • Processing:  Pixinsight – SPCC, DBE, SPCC, DynCrop, BlurXT, NoiseXT,
  • MStr, GHS, HST, PMath MStr + GHS + HST, Sat, Scale
  • Location:  Darling Hill Observatory near Vesper, NY