Sunday, July 9, 2017

M7- Ptolemy Cluster

M7 (a.k.a. Ptolomy Cluster or NGC 6475) is an open cluster in the constellation of Scorpius.  I am really liking these summer open clusters as there is a tremendous amount of gas and dust associated with them since they are in the direction of the center of the galaxy.  The cluster is estimated at a distance of 980 light-years and is 25 light years across.  M7 is detectable with the naked eye and I was actually able to see it along with M6.  Also visible in this image is a small globular cluster, NGC 6453, located to the right of M6 (source: wikipedia). 

I am definitely seeing the end of the light as I have only 15 more objects Messier objects left to image for my own complete catalog.  

M7 - Ptolemy Cluster
Location: St. John's Cemetery, Monroe, CT
Date: 6-26-17
Camera: Canon EOS Rebel T3i(a), Backyard EOS
Telescope: Orion ED80 80mm f/7.5 Apochromatic Refractor Telescope
Barlow: None
Focal Length: 600mm
Focal Reducer: Orion 0.8x Focal Reducer for Refractor Telescopes
Mount: Orion Atlas Pro EQ/AZ Mount
Filter: Astrodon UV/IR
Autoguiding: QHY-5L-II-M attached to an Agena 50mm Guide Scope with Helical Focuser
Exposure: 29 x 60s
ISO: 1600
Temp: 20 C
Post Processing: Deep Sky Stacker, Photoshop, Lightroom, Gradient Exterminator, Astronomy Tools, StarTools.

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