NGC 2359, commonly known as Thor's Helmet, is an emission nebula captured here through narrowband imaging over the period from April 4 to April 30, 2025. The dataset comprises 20.17 hours of total integration time, split between 128 frames through an Antlia 3 nanometer H-alpha filter and 114 frames through an Antlia 3 nanometer OIII filter, each with 300-second exposures. The imaging train consisted of a Sky-Watcher Esprit 120mm telescope paired with a ZWO ASI2600MM Pro monochrome camera, mounted on an AM5 equatorial mount. This nebula in Canis Major exhibits the characteristic helmet shape formed by a Wolf-Rayet star's stellar wind interacting with surrounding material. The data is offered as a one-time purchase at approximately $24.90 under a CC BY 4.0 license, permitting copying, modification and redistribution with appropriate attribution to the original author.
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