Messier 3

Full resolution (1600x1200 px  360kB)

150% resolution (540kB)

Object data of M3

Object type: globular star cluster (VI)
Size: 18.6'
Magnitude: 6.2 mag
Constellation: CVn
Distance: 34,000 Ly

Exposure data

Date: 2008-04-26 + 27 +  29
  Location: Nussbach / Austria (400m)
Telescope: 12" Newtonian telescope (f=1139mm)
Camera: ST2000XM with CFW8 and SBIG Filters
  Binning: L 1x1 / RGB 1x1
  Exposure time: L 36x2m / R 9x8m / G 9x4m / B 9x4m
Exposure time total: 3h 36m
Notes: many background galaxies