• NGC 5236 or M83 in Hydra, Southern Pinwheel Galaxy
    • M83 in Hydra, Southern Pinwheel
    Annotated image
  • The Southern Pinwheel Galaxy is a weakly barred, grand
  • design (two armed), spiral galaxy on the borders of
  • Hydra and Centaurus.  It contains 40 billion
  • stars and is 14.7 Mly from us.
  • Hover over the image for an annotated view.
  • Date:  24 May 2023, 30 and 31 May 2024
  • FOV:  approximately 54' × 36'; the angular size of M83 is about 12'
  • Telescope:  Orion 127mm Mak-Cass (1540mm, f/12.1)
  • Guiding:  ZWO ASI120MM mini mono guide camera,
  • ZWO 30F4 30mm mini guide scope
  • Computer:  ASIair pro Raspberry Pi
  • Mount:  ZWO AM5 mount
  • Camera:  ZWO ASI071MC pro cooled to -10°C
  • Pixel size:  4.78 μm
  • Resolution:  0.715 arcsec/pixel
  • Filter:  none
  • Stacking:  fourteen 240 second frames 24 May 2023,
  • nineteen 240 second frames 30 May 2024, and
  • twenty-seven 240 second frames 31 May 2024
  • with 20 dark flats, darks, and flats preprocessed in Pixinsight
  • Total Time:  4 hours
  • Processing:  Pixinsight – SPPC, DBE, SPCC, BlurXT, NoiseXT, DynCrop → Linear
  • MStr, GHS, HST, PMath MStr + GHS + HST → Stars, Sat,
  • StarXT, MStr, GHS, HST, PMath MStr + GHS + HST → Starless,
  • HDR465PhLm, Sat, PMath ~(~Stars*~Starless) → Blend, scale
  • Location:  May 24 and 30 at Darling Hill Observatory near Vesper, NY
  • May 31 at Crystal Lake near Redwood, NY