Quote:
Originally Posted by orestis
NGC 4755- This is an amazing cluster easily visible to the naked eye and easy to find.THe central star kappa crucis is a beautifull red coloured star which adds so much to the overall experience of this oc.there were about 8 or so bright stars framing the cluster and in between, a lot of little ones.lovely cluster.probally my favourite oc,that is untlill i discover more tremendous clusters.
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Orestis, great sketch.
Anyone who has ever done a sketch from the EP will know you need not only a good eye but a lot of patience. Lots of going back and forth between EP and page to position each star accurately in a sketch. Well done!
That central orange-red star is in fact DU Crucis, a variable of class M2. It is a stand-out in a sea of otherwise blue-white stars.
Wikipedia and others incorrectly identify it as kappa Crucis, which is actually the star at the end of the right leg of the bright "A" of stars. Kappa Crucis is a B3 class star of visual mag 5.98. The brightest star is actually NSV 6008 at visual mag 5.77.
See attached diagram ...
Regards, Rob