IC 1805, commonly known as the Heart Nebula, is presented here as a deep narrowband dataset totaling 23.67 hours of integration time. The data was captured over ten nights in October 2025 using a William Optics Zenth Star 73 telescope paired with a Player One Posiden camera on a Sky-Watcher EQ6 Pro mount. The acquisition comprises 116 frames through an Optolong L-extreme filter and 168 frames through an Askar D2 Ha-Sii filter, all at 300-second exposures.
This emission nebula in Cassiopeia offers rich hydrogen-alpha and sulfur-II detail suitable for bicolor or modified narrowband processing. The dataset is released under a CC0 1.0 Universal license, placing it in the public domain with no copyright restrictions, and is available as a free download for educational, research, or artistic projects.
Generated from the dataset's metadata; the author's description above is authoritative.