Wikipedia-

NGC 6819 is an open cluster (commonly known as an "open star cluster") located 7,200 light years away in the Cygnus constellation. It was discovered by Caroline Herschel on 12 May 1784.

Situated on the boundary of Cygnus and Lyra, NGC 6819 contains roughly two dozen stars of magnitude 10 to 12, with many more lower magnitude members.

The age of NGC 6819 is estimated here to be ~ 2.5 ± 0.5 Gyr.

Location & Date	Backyard, Abbott Observatory- Long Island, NY,  September,  2023
Telescope	TMB130SS F/7 APO, Moonlite focuser, Losmandy G11 Gemini Image scale 1.54 arcsec/pixel
Camera	SBIG ST-10XME Baader  LRGB filters CCD temp -10°C
Exposures	L-12x12m  R-12x2m G-12x2m B-12x2m Bin 1x1 for each panel
Planning & Acquisition	Sequence Generator Pro  (4-panel mosaic)
Processing	CCDStack - calibration, debloom Astro Pixel Processor  Mosaic assembly,  LRGB processing Photoshop  additional processing RC-Astro Star XTerminator, Noise Xterminator