M13 - Great Hercules Cluster

Full resolution (1600x1200 px  350kB)

Object data

Object type: globular cluster (V)
Size: 16.6'
Magnitude: 5.9 mag
Constellation: Her
Distance: 22000 Ly

Exposure data

Date: 2005-05-12/13
Location: Schlierbach / Austria (400m)
Telescope: TeleVue NP101 (4" Apo f=540mm)
Camera: ST2000XM with CFW8 and SBIG Filters
  Binning: RGB 1x1
  Exposure time: R 6x10m / G 6x5m / B 6x5m
Exposure time total: RGB 120 min
Notes: 15 galaxies visible (NGC6207 is the brightest one)