This dataset captures Sh2-224, a faint emission nebula in Cassiopeia, through 32.5 hours of narrowband imaging collected between December 17 and 29, 2024. The data comprises 176 frames through an Antlia 3nm H-alpha filter (300 seconds each) and 214 frames through an Antlia 3nm OIII filter (also 300 seconds each), all acquired with an ASI294MM Pro monochrome camera on a TS-130 APO refractor mounted to an AM5. This dual-filter approach isolates the nebula's ionized hydrogen and oxygen emissions, revealing structural details often lost in broadband imaging. The dataset is available as a one-time purchase at approximately $19.90 under a CC BY-NC 4.0 license, permitting copying, modification and redistribution for non-commercial purposes.
Generated from the dataset's metadata; the author's description above is authoritative.