The Rosette Nebula

Taken over the course of 57 nights, this is 200 hours of exposure on the Rosette Nebula from my Bortle 8.5 sky in Nashville, Tennessee. You can see the (relatively) bright, familiar structure of the Rosette, but also the much fainter hydrogen surrounding it, along with delicate, intricate details deep in the core. I realize that putting this much time into such a bright target is probably overkill, but as far as I know, nobody has ever created a single-panel image of the Rosette Nebula with this much exposure time. The longest I could find was 100 hours, and I wanted to see for myself what a super-deep shot of the Rosette would look like. I’m very pleased with the result, and I hope you enjoy this image as much as I enjoyed creating it. Technical details: Dates: 1/1/26 - 4/12/26 Frames: Antlia 3nm Narrowband H-alpha 2": 846×300″(70h 30′) Antlia 3nm Narrowband Sulfur II 2": 833×300″(69h 25′) Chroma OIII 3nm Bandpass 2": 725×300″(60h 25’) Total integration: 200hrs 20min Equipment: Telescope: Askar 120APO Camera: ZWO ASI2600MM Pro Mount: ZWO AM5 Filters: Antlia 3nm Narrowband H-alpha 2", Antlia 3nm Narrowband Sulfur II 2", Chroma OIII 3nm Bandpass 2" Accessories: Askar 0.8x Full Frame Reducer / Flattener for 120APO Telescope, ZWO ASIAIR Plus, ZWO EAF, ZWO EFW 7 x 2″ Software: Adobe Photoshop, Aries Productions Astro Pixel Processor (APP), Pleiades Astrophoto PixInsight, ZWO ASIAIR

• Fujicolor Crystal Archive Professional Lustre Paper
• 210gsm
• Vibrant, fine-grain pebble texture
• Archival: 100+ years on display, 200+ years in storage
• Silver halide, RA-4 wet printing process
• Sizing: White borders do not change size of the print