It shows that some disruption has occurred to the comet’s nucleus during its perihelion passage on 15 November. Catalina now has two tails on show. It will be interesting to see your own images of the comet now that it is begun to make its appearance in the Dawn sky.
Top right: Image of Catalina on 9 November.
It’s magnitude is now +6 and it is expected to grow brighter to Mag +5.5 on 15 January 2016 so binoculars will be needed to show the comet as a nice sight in the dawn sky.