Star Clusters - Globular and Open - post your images of clusters

[Blackbird]

Caldwell 98 The Coal Sack Cluster
from the wiki
NGC 4609 (also known as Caldwell 98) is an open cluster of stars in the southern constellation of Crux. It was discovered on May 12, 1826 by the Scottish astronomer James Dunlop.[4] The cluster has an apparent visual magnitude of 6.9[2] and spans an angular size of 6.5′.[1] It is situated beyond the Coalsack Nebula[5] at an estimated distance of 4,500 ly (1,379 pc) from the Sun

View attachment 11655

Wow...

 

[Levina de Ruijter]

Caldwell 98 The Coal Sack Cluster
from the wiki
NGC 4609 (also known as Caldwell 98) is an open cluster of stars in the southern constellation of Crux. It was discovered on May 12, 1826 by the Scottish astronomer James Dunlop.[4] The cluster has an apparent visual magnitude of 6.9[2] and spans an angular size of 6.5′.[1] It is situated beyond the Coalsack Nebula[5] at an estimated distance of 4,500 ly (1,379 pc) from the Sun

View attachment 11655

There are sooo many stars in the image but am I right that the actual cluster is made up of the stars in the middle? Is the big star (red giant maybe?) south-west of it also part of the cluster?

Another mind blowing image, Jeff!

 

[Jeff WX1USN]

There are sooo many stars in the image but am I right that the actual cluster is made up of the stars in the middle? Is the big star (red giant maybe?) south-west of it also part of the cluster?

Another mind blowing image, Jeff!

Yes the cluster is the 8 bright stars and several fainter ones to the upper right of the really bright star

 

[Jeff WX1USN]

Caldwell 105 2 1/2 minute exposure taken with the Slooh Australia Observatory 20" (dia) scope. Processed in Pixinsight and Lightroom

The globular cluster is situated in the very southerly constellation Musca[6] at a distance of 21,500 light years from Earth.[4] It is located near the Coalsack Nebula and is partially obscured by this dusty region of the galactic plane.[7] After corrections for the reddening by dust, evidence was obtained that it is in the order of 2 billion years older than globular clusters M5 or M92.[11]
This is a massive, metal-poor globular cluster that shows evidence for multiple generations of stars