IC 4628, commonly known as the Prawn Nebula, is offered here as a free download dataset captured on 2026-04-22. The acquisition consists of 23 frames taken through an Optolong ultimate dual narrowband Ha and OIII filter, each exposed for 60 seconds, yielding a total integration time of approximately 0.38 hours. Imaging was performed with a Sky-Watcher Quattro 250P / 10-S telescope paired with a Touptek 2600 colour camera, mounted on an HEQ5 pro. This emission nebula in Scorpius presents a complex structure of ionized hydrogen and oxygen, making it a compelling target for narrowband imaging despite the modest integration time. The dataset is released under the CC0 1.0 Universal license, placing it in the public domain with no copyright restrictions.
Generated from the dataset's metadata; the author's description above is authoritative.