COMET SCHWASSMANN-WACHMANN (73P) Taken by John Drummond on February 25, 2017 @ Gisborne, New Zealand
Heres an image of 73P - or rather the two main fragments of the comet which recently split.
35cm f10 ACF SCT, SBIG STF8300M CCD, Clear, 3x3, 20 x 20 sec. I stacked on the two fragments and the stars turned into a swirl! Possibly a result of the two fragments orbiting a common center of gravity.