Saturday May 11 2019.
I had some nice clear sky and felt the time was ripe for a sketch.
The naked eye limiting magnitude on the night was around 4. In the sketch itself the stars are down to the 9th magnitude using the 25/15 and 9mm eyepieces from a light polluted urban backyard in Durban, South Africa.
The Sketch is done with white pastel pencil on A5 black sketch paper.
The image has had the labels added in photoshop and the edges of the image cropped ever so slightly, so as you can see the sketch fills almost the entire A5 page.
I spent a roughly a hour on the sketch, I was careful to try get the stars well plotted and I think I got pretty close. The orientation is that as seen in the eyepiece at the time. Sadly the sketch does not convey the colours in the stars that give it it's name. Maybe a Photoshop project at a later point.
NGC 4755 is a well known and viewed Southern Sky object in the southern constellation of Crux, also known as the Southern Cross.
The cluster was first discovered by the astronomer Nicholas Louis de Lacaille during his visit to South Africa from 1751-1752.
John Herschel described the cluster as "A casket of variously coloured precious stones", hence the name "The Jewel Box".
And here is my humble attempt at this open cluster.
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