M9 - Globular Cluster in Ophiuchus

M 9 (NGC 6333) is a globular cluster located in the contellation Ophiuchus. It was discovered by Charles Messier in 1764. He described it as a "nebula without stars." William Herschel later determined that this object contained stars.

M 9 lies approximately 26,000 light years away and has a diameter of 90 light years. It contains 100,000 stars, many of them being variable stars. This globular cluster is relatively close to us as these objects reside in the halo around our galaxy. They contain some of the oldest known stars.

Some dark nebulae are visible in the foreground.

Telescope: TS-10 f/5 Newtonian
Camera: Modified Canon 650D; ISO 1600
Mount:  iOptron CEM60
Guiding: QHY 5L II-M on 60 mm guide scope
Exposures: 11 @ 5min.
Processing:  Images were focused using the camera's live view. Subframes were aligned and combined in ImagesPlus. The composite image was adjusted in Photoshop. Topaz Detail and DeNoise were applied.
Note: Taken from my backyard observatory in southeastern Minnesota on 6/25/19.
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