With Comet d'Arrest rapidly approaching perihelion and showing signs of life as reported by several observers, I decided to accumulate exposure of this body on the nights of July 22-23. I added a total exposure of 45' on July 22. The resulting image shows a short extension (tail?) of 28" at PA 227º.
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On July 23 I captured an even longer total exposure of the comet. The aim was obtaining and even deeper image of the outter coma. The overall condensation of the coma has a diameter of roughly 21", and a fan-like extension seems to be developing.
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