This dataset captures IC 2177, commonly known as the Seagull Nebula, through 22.25 hours of narrowband imaging collected between February 19 and March 5, 2025. The data comprises 114 frames through an Antlia 3nm H-alpha filter, 93 frames through OIII, and 60 frames through SII, all exposed for 300 seconds each. Acquisition used a TS-130 APO Refractor paired with an ASI294MM Pro monochrome camera on an AM5 mount.
The three-filter narrowband approach provides the spectral information needed to map ionized hydrogen, oxygen, and sulfur emissions across this large emission complex in Monoceros. The dataset is available for approximately $22.90 as a one-time purchase under a CC BY 4.0 license, permitting copying, modification, and redistribution with appropriate attribution to the original author.
Generated from the dataset's metadata; the author's description above is authoritative.