Horsehead Nebula (B33) in Orion -- cropped
This is a crop of the photo below.
The dark Horsehead Nebula (Bernard 33) is adjacent to the most eastern star, Zeta Orionis, in the belt of the Orion constellation.  This is a joint collaboration of James Foster of Frazier Park California and Michael Stecker of Los Angeles. A Sky-Watcher 250P, 10-inch f/4 Newtonian, telescope was used at Frazier Park.
file: HorseheadJRF-10Newt115minHL_HR_G_B3B-9262023-a3-cr1a.jpg

Photographic Data
telescope:
Sky-Watcher Quattro 250P, 10-inch f/4 Newtonian telescope with coma corrector
Focal Length: 1,000 mm
 

mount:
Astro-Physics 1200 GTO

imaging camera:
ZWO ASI2600MC-Pro color astro-camera.

exposure:
300 sec X 23 (115 minutes)

guiding:
SVBony 60 mm f/4 guide scope (FL= 240 mm) with ZWO ASI120MM Mini guide camera
 

processing
Aquired and stacked by James Foster with Maxim DL.  Post-processed and cropped in Adobe Photoshop Elements by Michael Stecker.
.
photographic site:
James Foster's observatory at Frazier Park California
https://en.wikipedia.org/wiki/Frazier_Park,_California
(Bortle 4 at 5,500 feet elevation)