Hercules Cluster
About this celestial object
M13, the great globular in Hercules, scintillates with stars even in a short stack.
M13 is one of the most striking globular clusters of the northern sky; prominent in binoculars, in a telescope a dense swarm of countless suns.
Drier air and a bit more altitude aid the contrast — despite the short total time, the granularity comes through.
250 mm f/5, total integration 330 s.
Image and observation
Catalogue: M 13
Capture date: 2026-04-27
Total exposure: 6720 s
Imaging and processing: Ulrich Schwarz · Vespera Pro