The Chinese Dragon Nebula NGC 6559 dataset comprises 36.9 hours of integration time captured between June 30 and August 7, 2026. All 443 frames were acquired through an Antlia ALP-T filter at 300-second exposures using an Askar 91F APO Refractor paired with a ZWO ASI585MC Air camera on an ML-Astro SAL33 mount.
This emission and reflection nebula complex in Sagittarius presents intricate dust lanes and glowing hydrogen regions that give rise to its dragon-like appearance. The dataset is available as a free download under a CC BY-NC 4.0 license, permitting copying, modification and redistribution for non-commercial purposes. The extended integration time provides substantial signal depth for processing this relatively faint nebular structure adjacent to the better-known Lagoon Nebula region.
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