Globular cluster Palomar 9

Posted by dcrowson
on Wednesday, August 24, 2016

Palomar 9 (NGC 6717, Collinder 395 and others) is a Shapley-Sawyer class VIII (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 23,000 light-years away in Sagittarius. At approximately 8.4 magnitude, this is probably the easiest Palomar globular to see although it is located right below the bright star 35 Sgr (HIP 92845, SOA 187445 and others).

Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2

240 minutes total exposure – 4 hours

Imaged July 11th and August 23rd, 2016 from Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

LRGB - https://www.flickr.com/photos/dcrowson/28585347514/sizes/l

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