This dataset captures the Horsehead Nebula (B33) alongside the Orion Nebula region through 12.25 hours of total integration. Acquired over three nights from November 6 to November 8, 2025, the data consists of 245 frames at 180 seconds each, all captured through an Askar E1 Dual Band 3nm filter isolating hydrogen-alpha and oxygen-III emission lines. The imaging train paired a Nikon 180mm f/2.8 lens with a ZWO ASI2600MC Air camera, mounted on an AM5N tracking platform.
The narrowband dual-filter approach emphasizes nebular structure while suppressing broadband light pollution, making this dataset particularly suitable for processors interested in emission nebula detail. The files are offered under a CC BY-NC 4.0 license, permitting copying, modification and redistribution for non-commercial purposes. Access is available as a one-time purchase for approximately $14.90.
Generated from the dataset's metadata; the author's description above is authoritative.