Simcoe Skies Astronomy

M4 - NGC 6121

M4 Globular Star Cluster (NGC 6121) A neighbour in Scorpius. Magnitude: 8.6 Location: Scorpius Distance: 7500 LY Date: June 18/06 Exposures: 47 of 110 (windy night) Exposure length: 5 seconds Amp on setting: OFF Brightness: 51 Gain: 60 Gamma: 52 Color Balance: R30B14 L-Meter: 233 Filters: IR Notes: One of the nearest globular clusters in our galaxy.