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Old 13-08-2018, 08:45 PM
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ngcles
The Observologist

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Join Date: Dec 2006
Location: Billimari, NSW Central West
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Are NGC 6540, DJ-2 & AL-3 observable with 4"?

Hi Allan,

Quote:
Originally Posted by Allan View Post
G'day John. Yes, but you have to own something like a NP101. I like that scope so much, because it does things not many others can. There are numerous globular cluster clusters around the sky I can fit into the 31 Nagler. Just to name a few

M22, M28, NGC6638, 6642

M69, M70, NGC6624, 6652

NGC6522, 6528, 6558, 6569, AL3

NGC6522, 6528, 6540, 6553, AL3, Djorg2

M28, NGC6544, 6553

M19, M62, NGC6293, 6304, 6316

M19, NGC6284, 6287, 6293, 6325

M4, M80, NGC6144

M9, NGC6356, 6342
Though the groups of G.C's you list can be contained in a 31mm T5 field in the refractor, are you actually able to see all those listed in that aperture? I'd think NGC 6540, DJ-2 and particularly AL-3 somewhat ... difficult, in that aperture? Even NGC 6325 would be a very difficult object too.


Best,

L.
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