Caldwell 3
About 14.5 million light-years away is Caldwell 3, or NGC 4236. Caldwell three is a barred spiral galaxy, though it appears fairly diffuse to wide field telescopes. Believe it or not, this galaxy is actually a part of the group of galaxies that include M81 and M82, which are approximately 11.7 million light-years from earth.
June 5, 2024
Once again, a fairly tiny (and faint) target for my Redcat, I targeted Caldwell 3 last night. This galaxy is fairly faint and rather diffuse overall, and would certainly benefit from a longer focal length. Looking forward to revisiting this one.
Technical Details
Imaging Telescope: William Optics RedCat 51 II
Imaging Camera: ZWO ASI533MC Pro
Mount: Sky-Watcher EQ6-R Pro
Filter: Antlia Tri-band RGB Ultra Filter - 2” Mounted
Accessories: ZWO ASIAIR Plus, ZWO EAF, ZWO Filter Drawer (Gen 2)
Software: Siril, Starnet, Photoshop, NoiseXterminator
Guiding Telescope: William Optics UniGuide 32
Guiding Camera: ZWO ASI174MM
Imaging Dates: June 4, 2024
Frames (gain 101.0) f/4.9 -10c: 85x180” (4h15m)
Integration Time: 4h15m
Darks/Flats/Dark Flats: 30/25/30
Bortle Dark-Sky Scale: 6.00