Dr Belton will analyze data from the Deep Impact mission with the object of understanding the spin state of the comet nucleus. This will build on work already started in a preliminary way during the Deep Impact mission. Dr Belton will test the assumption that the spin state is fully relaxed and how well outbursts can be related to specific geographic locations on the surface of the comet nucleus. In the first year the work will focus on the spin state itself. In the second year the relationship of outburst timing to the rotational phase will be established. In the third year the morphology of the outbursts as seen by remote observers will be folded into the picture and a complete description of the outburst phenomenon achieved.