Rich globular cluster in Aquarius holding about 150,000 stars, one of the largest known. ~37,500 ly.
Scope: ~2500mm: 127-150mm Mak/SCT (+Barlow)
Camera: Colour OSC (e.g. IMX533/585) + UV/IR cut
Exposure: 60-120s subs, 2h+ total (guided)
