• NGC 2099 or Messier 37 in Auriga
    • M37 in Auriga
    Annotated image
  • NGC 2099 (Messier 37), is the brightest open cluster in Auriga.
  • M 37 contains 500 stars and is 4.5 kly from us.
  • Hover over the picture for an annotated version
  • Date:  27 August 2025 and 20 March 2023
  • FOV:  approximately 60' × 40'; the angular size of M37 is about 24'
  • Rotation:  0.005°
  • 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, 2023, and ZWO AM5, 2025
  • Camera:  ZWO ASI071MC Pro Cooled (-10°C) Color CMOS, 2023
  • ZWO ASI6200MC Pro Cooled (-10°C) Color CMOS, 2025
  • Filter:  Baader Light Pollution Moonglow filter with IR cut, 2023
  • Optolong UV/IR, 2025
  • Pixel size:  3.76 µm
  • Resolution:  1.052 arcsec/pixel
  • Frames:20 March202316 × 240 seconds × 100 gain,
  • 27 August202531 × 240 seconds ×90 gain
  • Stacking:  forty-seven frames using Pixinsight
  • Calibration:  20 dark, 20 flat, 20 dark flat each session
  • Total Time:  3 hours and 8 minutes
  • Processing:  Pixinsight – SPCC, DBE, BlurXT, NoiseXT, GHS, HST, MStr,
  • PMath GHS + HST + MStr, Sat, DynCrop/Scale
  • Location:  Kopernik Observatory near Vestal, NY, 2023
  • Darling Hill Observatory near Vesper, NY, 2025