Messier 4 is a globular cluster and one of the closest ones to us at a mere 7,200 light years away. But perhaps the biggest claim to fame for this cluster that it is apparently the very first globular cluster in which the telescopes of the mid-1700s could actually resolve individual stars.
Here are the technical details for those handful who might be interested:
Scope: Starblast 4.5; tracking on
Magnification: ~30x
Camera: iPhone6 using NightCapPro app; ISO 8000
Processing: 2x7 sec. images stacked in Deep Sky Stacker; with darks; adjusted curves using GIMP
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