Derby and District Astronomical Society

Asterisms



This image of The Coathanger, or Brocchi's Cluster, within the constellation of Vulpecula, was captured by Peter Branson on the 14th July 2022. It comprises 3 separate images of 8x120seconds - 16 minutes for each photo. The camera used was a ZWO ASI533 cooled colour camera together with a TS Optics Photoline f7 telescope with a Hutech IDAS light pollution filter and field flattener attached mounted on an NEQ6 mount. A filter wheel fitted with LRGBHa filters was used to capture just the L (Luminance) component. The images were stacked in Nebulosity, then PixInsight was used to remove background gradients and noise and some further post-processing including using levels and curves. The three separate square frame images were combined in Microsoft Images Composite Editor (ICE).   Image © Peter Branson



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