Comet in Taurus anno

In my defence it was a very wispyhigh cloud night with a waning Moon rising. I think I found thhe periodic Comet 144P/Kushida but it must be tiny as well as faint. This image is from a stack of 20 second lights taken with my Canon 600d DSLR and a Samyang 135mm lens at Iso1600. Where Stellarium said it should be, I found a faint bluish-green smudge but I stand to be corrected! Anyway I never was any good at image scale.