2019y4 20200407 0213 ptickner

This equally processed comparison of three successive sets, each of 85x60seconds through my 356mm SCT, seems to show the comet becoming slightly more diffuse - the latter individual sub-frames are visibly less bright around the coma than the first sub-frames.  The top image is the first 85, the middle the second and the lower image the last ones, from the early hours of 7th April.   The negative image clearly shows the elongated coma.

 

It may be my imagination but in some sub-frames there appears to be a clear change in the shape of the coma and more obvious scattering of debris almost at 45 degrees in others.  All my images were guided off-axis on a star in the field of view.
20200406_07 2145-0213