M13.jpg
M13, Hercules Cluster, ↕ 22000 LY, Ø 16.6', ☼ 5.8, 900 mm, ƒ4.5, Gain 120, 57x1 min, # 14x9 mm, Lauwersoog (Bortle 4.2; 6x), 29.05.23