• NGC 3031 or Messier 81 in Ursa Major
    • M81
  • M81 (NGC 3031) was first known as Bode's Nebula.
  • UGC 5336, a very faint irregular galaxy, is (barely) visible below M81.
  • Date:  12 June 2021
  • FOV:  approximately 51' × 34'; M81's long axis is about 27'
  • Telescope:  Orion 127mm Mak-Cass (1540mm, f/12.1)
  • Guiding:  tracking only
  • Computer:  HP laptop running Astro Photography Tools
  • Mount:  Orion Sirius EQ-G
  • Camera:  ZWO ASI071MC Pro Cooled (0°C) Color CMOS with gain 240
  • Filter:  none
  • Stacking:  Thirty-one 180 second frames using Deep Sky Stacker
  • Total Time:  1 hour 33 minutes
  • Processing:  GIMP
  • Location:  Darling Hill Observatory in Vesper, NY