This dataset captures Sh2-27, a faint emission nebula in Ophiuchus, over 20.17 hours of narrowband integration. The data spans 54 nights from early April to late May 2025, using a Sky-Watcher Esprit 120mm refractor and ZWO ASI2600MM Pro camera on an AM5 mount. The acquisition consists of 133 frames through an Antlia 3nm H-alpha filter (300 seconds each) and 109 frames through a matching OIII filter, providing dual-channel narrowband coverage of this delicate structure. The region surrounds the runaway star Zeta Ophiuchi, whose supersonic motion through the interstellar medium creates a bow shock visible in infrared wavelengths. Licensed under CC BY-NC 4.0, the calibrated frames are available for roughly $24.90 as a one-time purchase, permitting non-commercial use, modification and redistribution.
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