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Moon ISS Transit: Composite Image | by alexandru.barbovschi
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Moon ISS Transit: Composite Image

Sky-Watcher Star Adventurer mount (it has a lunar tracking mode available) + Sky-Watcher Evostar 72ED (72/420mm) + filter wheel with Baader LRGB filters set (for the transit UV/IR filter was used) + Barlow 2x + ZWO ASI174MM camera. To get the color shot R, G and B channels, 3000 frames per each (and 3000 more through UV/IR filter, which was used as L channel later on). As the Moon doesn't fit the field in this configuration, two panels were shot. ISS cropped out manually using Gimp; stacked and sharpened using cvAstroAlign (25 frames out of 70 went into stack); later on got ISS out using Gimp. Moon stacked using AutoStakkert! 3, then aligned the channels using PlanetarySystemLRGBAligner, then combined to obtain RGB using ImageMagick; L channel added in Gimp. Then assembled the panorama using Hugin. Post-processing in RawTherapee. Adding ISS back using Gimp

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Taken on March 29, 2021