discovered by Gottfried Kirck in 1764. It is one of the largest and
oldest globular clusters in our galaxy. It is 165 light years across
and is estimated to be about 13 billion years old, nearly the age of the universe itself.
in. f/4.7 Newtonian; Baader coma corrector
||Modified Canon T2i (550D);
ISO 800; Raw capture
|| Losmandy G11
||SSAG on 50mm Lumicon
||13 @ 3minutes
focused using Live View. They were converted to tiff files in Canon
Digital Photo Professional before being calibrated, aligned and combined
in ImagesPlus. The composite was slightly cropped and adjusted in
Photoshop. Noise was reduced using Topaz DeNoise. GradientXTerminator was applied as well.
||Taken from my backyard
observatory in southeastern Minnesota on 6/7/12. Temp: 70F; Humidity:
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