M 92: a globular cluster in Hercules

This is one not the famous Hercules cluster.

A bit fainter, smaller, and farther away than its more famous sibling, sitting on the top of the constellation of Hercules, M 92 is still one of the brightest  and oldest clusters in the Galaxy.  It is 27,000 light years away, extends almost 150 light years in diameter, comprises about a million stars (its mass is 330,000 solar masses).

Images taken: Sept. 28-29, 2022, by Bay Merrell & Connor Beach.

Telescope: CDK 17 in.

Camera: SBIG ST-10 CCD.

Exposures: 90 min red, 90 min green, 90 min blue (4h30m total).

Image processing: CCDoops + CCDSoft  + Photoshop CS.