aka
C/2009 G1 Ruan. Imaged using G15 on May 2 2009 19:21:19 - 20:00:13 UTC. 10 x 120 sec exposures bin 2.
The image below is the sum of 10 luminance images aligned on the comet

you can just about see the tail on it, enhanced below by applying a 5.0 deg Larson-Sekanina rotational gradient

