This dataset captures Sh2-171, a hydrogen emission nebula in Cepheus, through 23.67 hours of narrowband exposures collected between September 30 and October 24, 2024. The imaging train paired a TS-130 APO refractor with an ASI294MM Pro monochrome camera on an AM5 mount. Data comprises 118 five-minute hydrogen-alpha frames, 89 oxygen-III frames, and 77 sulfur-II frames, all acquired through Antlia 3nm filters. This tri-band approach isolates specific emission lines within the nebula's ionized gas clouds, enabling detailed false-colour compositions. The dataset is offered as a one-time purchase at approximately $24.90 under a CC BY-NC 4.0 license, permitting non-commercial copying, modification, and redistribution while crediting the original acquisition.
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