Omega Centauri

NGC 5139, the huge globular cluster Omega Centauri.

A favourite object to image and a natural subject for my first test image taken using a guidescope and accurate polar alignment since purchasing the ED120 refractor.


Exposure: 1 x 3 min ISO 250 + 1 x4 min  ISO 100 + 1 x 4min ISO 200.
Gear: ED120 refractor, 840mm f/l, f/7, Canon EOS 60D. No filter, no darks, no flattener.
Location: Leumeah, NSW, three days prior to full Moon. (2017-07-06).


Visual magnitude +3.7; apparent diameter 55 arc-min (almost two moon-widths); actual diameter 270 light years; distance 17,000 light years

Image © R.Powell



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