Abell 33 (PN G238.0+34.8, PK 238+34 1 and others) is a planetary nebula located approximately 3250 light-years away in Hydra. HD 83535, the bright star ‘near’ it leads to the diamond ring look in images.
NGC 2974 (PGC 27762, UGCA 172 and others) at the bottom left appears to be an elliptical galaxy. This one is approximately 69 million light-years away.
Simbad shows a reflection nebula somewhat close to Abell 33 but it does not show up at the location in my image. DG 124 (DOCdb — Dorschner & Gürtler (1963)) appears to be the same size as Abell 33 so I think it could be the same object with a bad position.
Luminance – 12x600s – 120 minutes – binned 1x1
RGB – 8x300s – 40 minutes each – binned 2x2
240 minutes total exposure – 4 hours
Imaged on February 27th, 2022 at the Danville Conservation Area (New Florence, Missouri) with a SBIG ST-8300M on an Astro-Tech AT90EDT at f/6.7 603mm.
LRGB - https://www.flickr.com/photos/dcrowson/52202032035/sizes/l/