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M20 and M21 - Nebula and Open Cluster

This shot was taken with the Hyperstar 3 equipped Nexstar 11GPS on 7/26/09 under the light polluted skies of Phoenix.


The camera used was the modified Canon Rebel 1000xs. This image is the result of a stack of 15-second IS0-1600 subs stacked in Nebulosity 2. The open cluster, also known as NGC 6531, is to the right of M20, the Triffid Nebula. Note the very distinctive circle of stars in M21...


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