M4 - The Scorpio Globular
A large globular cluster located adjacent to Antares in Scorpio.


  • RA: 16:24
  • Dec: -26:32
  • Size: 26.3'
  • Magnitude: 5.9
  • Distance: 6800 ly
  • Constellation: Scorpius
  • Millennium Star Atlas: Vol. III, p. 1397
  • Scope: 8" SCT at f/11
  • Autoguider: ST-4 in faint mode
  • Sky conditions: Very transparent, excellent seeing and cold
  • Film: Fuji Super G 800+
  • Exposure: 20 minutes
  • Date: 6-14-99

The umpteenth reshoot of an object which defies my every attempt to do a really good job on it. It doesn't help that SCTs don't do too well on objects which lie far from the vertical.


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