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Old 15-05-2019, 10:59 AM
Startrek (Martin)
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Location: Sydney and South Coast NSW
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NGC 6121 or M4 Globular Cluster

With the moon dominating the night sky , thought I would image M4 which I haven’t done before. It’s a beautiful little cluster in the constellation of Scorpius and at magnitude 5.9, I was struggling to push past 1 minute exposures as the histogram was pushing towards half way due to lunar glare and my neighbours Las Vegas exterior lighting

60 x 1 minute dithered guided subs
15 x darks
ISO 800
Canon 600D with Baader coma corrector
Stacked in DSS
Processed in Startools
Guiding was poor at 1.50 to 2.00 arc sec ( kept hunting for a better guide star throughout the session )

Thanks for looking
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  #2  
Old 16-05-2019, 10:49 AM
John W (John Wilkinson)
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NGC 6121 or M4 Globular Cluster

Hi Martin,
Considering the moon was up, you did well. A nice shot.
Thanks,
JW.
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  #3  
Old 16-05-2019, 04:08 PM
Startrek (Martin)
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Thanks John
Yes I was pleased with the result considering the conditions
Cheers
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