• NGC 6121 or M4 in Scorpius
  • M4
  • NGC 6121, (Messier 4), in Scorpius is a globular cluster with a "bar" of stars across the core.
  • FOV is approximately 54' × 36'; the angular size of M4 is about 36'.
  • Nine 360 second guided subs (54 minutes), Orion Sirius EQ-G mount,
  • taken at the Darling Hill Observatory in Vesper, NY on 4 July 2021.
  • ZWO ASI120MM mini mono guide camera, ZWO 30mm guide scope,
  • ZWO ASI071MC Pro Cooled (0°C) Color CMOS with gain 90,
  • Baader LP Moonglow IR filter, Orion 127mm Mak-Cass (1540mm, f/12.1).