This Propeller Nebula dataset comprises 15.75 hours of total integration captured between June 29 and July 4, 2025, using an Askar 71F telescope paired with a ZWO ASI 533MC Pro camera on an AM3 mount. The acquisition consists of 140 frames through an Optolong L-Extreme HA-OIII 7nm filter and 175 frames through an Askar Color Magic D2 SII-OIII 6nm filter, all at 180-second exposures. This dual narrowband approach isolates emission lines from ionized hydrogen, oxygen, and sulfur, providing raw material suitable for bicolor or tricolor processing workflows. The data is offered as a free download under CC BY-NC 4.0 license terms, permitting copying, modification, and redistribution for non-commercial purposes.
Generated from the dataset's metadata; the author's description above is authoritative.