Popular Post Bottletopburly Posted May 29, 2022 Popular Post Share Posted May 29, 2022 Messier 3 2.5hrs 200pds ,zwo533mc +seven_legs, Clive, +Graham and 6 others 9 Link to comment Share on other sites More sharing options...
+Glafnazur Posted May 29, 2022 Share Posted May 29, 2022 That's excellent David 👍 Bottletopburly 1 Link to comment Share on other sites More sharing options...
Bottletopburly Posted May 29, 2022 Author Share Posted May 29, 2022 more data from the 24th bringing data to 4.40hrs. +Glafnazur and +Bino-viewer 2 Link to comment Share on other sites More sharing options...
+Bino-viewer Posted May 29, 2022 Share Posted May 29, 2022 Nice capture David 👍🏼 I learnt this weekend that Globular clusters have a classification of 'concentration' on a scale of 1 - 12. Its called the Shapley-Sawyer concentration class scale with class 1 being the most compact and concentrated to 12 being the opposite, and very loose. M3 is at Class 6. M80 on the other hand is Class 2 as is Messier 2. At class 1 there is M75 (not seen any of them) At the other end of the scale you have something like M68 and M55 (Class 10 and 11) that are very loose with little in the way of concentration towards the centre of the cluster. Interesting stuff. Theres plenty of Globulars out there and a fair few that i haven't observed myself yet and need to track down This months AN magazine has a feature on my favourite constellation, Scorpius. I've seen M4 before but need to reacquaint myself with it, but nearby M80 is one i haven't seen. I need a darkish sky though and a good southern horizon, so it will be one to hunt down next time i'm up at Tannenbaum. +RonC and Bottletopburly 2 Link to comment Share on other sites More sharing options...
Bottletopburly Posted May 29, 2022 Author Share Posted May 29, 2022 11 minutes ago, Bino-viewer said: Nice capture David 👍🏼 I learnt this weekend that Globular clusters have a classification of 'concentration' on a scale of 1 - 12. Its called the Shapley-Sawyer concentration class scale with class 1 being the most compact and concentrated to 12 being the opposite, and very loose. M3 is at Class 6. M80 on the other hand is Class 2 as is Messier 2. At class 1 there is M75 (not seen any of them) At the other end of the scale you have something like M68 and M55 (Class 10 and 11) that are very loose with little in the way of concentration towards the centre of the cluster. Interesting stuff. Theres plenty of Globulars out there and a fair few that i haven't observed myself yet and need to track down This months AN magazine has a feature on my favourite constellation, Scorpius. I've seen M4 before but need to reacquaint myself with it, but nearby M80 is one i haven't seen. I need a darkish sky though and a good southern horizon, so it will be one to hunt down next time i'm up at Tannenbaum. I have an image somewhere of a real small cluster, I will see if I can find it . Link to comment Share on other sites More sharing options...
+Graham Posted May 29, 2022 Share Posted May 29, 2022 Very pretty Dave Bottletopburly 1 Link to comment Share on other sites More sharing options...
philjay Posted May 29, 2022 Share Posted May 29, 2022 Good resolution and colour Bottletopburly 1 Link to comment Share on other sites More sharing options...
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