Table 2: Projected mean expansion velocities of the outermost part of the dust and gas cloud. $\Delta t$ gives the time since impact and p the projected distance from the nucleus of the outermost detectable part of the impact cloud. PA lists the position angle at which the measurement was done, with respect to the projected solar direction.

PA		 date, time $\Delta t$ [s] p [104 km] v [km s-1]
CN
0$^\circ $ July 4, 23:50 65 182 $\rm 7.50^{+0.25}_{-0.25}$ $\rm 1.15^{+0.04}_{-0.04}$
180$^\circ $ July 4, 23:50 65 182 $\rm 7.75^{+0.23}_{-0.38}$ $\rm 1.19^{+0.04}_{-0.06}$
90 July 5, 00:48 68 628 $\rm 7.78^{+0.33}_{-0.15}$ $\rm 1.15^{+0.05}_{-0.02}$
270 July 5, 00:48 68 628 - -
0$^\circ $ July 5, 01:58 72 861 $\rm 8.45^{+0.25}_{-0.57}$ $\rm 1.16^{+0.03}_{-0.08}$
180$^\circ $ July 5, 01:58 72 861 $\rm 8.86^{+0.51}_{-0.38}$ $\rm 1.22^{+0.07}_{-0.05}$
0$^\circ $ July 5, 03:46 79 334 $\rm 8.83^{+0.62}_{-0.21}$ $\rm 1.11^{+0.08}_{-0.03}$
180$^\circ $ July 5, 03:46 79 334 $\rm 9.89^{+0.18}_{-0.39}$ $\rm 1.25^{+0.02}_{-0.05}$
Dust
270$^\circ $ July 5, 00:48 68 628 $\rm 2.53^{+0.12}_{-0.36}$ $\rm0.37^{+0.02}_{-0.05}$
0$^\circ $ July 5, 01:58 72 861 $\rm 1.51^{+0.13}_{-0.15}$ $\rm0.21^{+0.02}_{-0.02}$
0$^\circ $ July 5, 03:46 79 334 $\rm 1.56^{+0.16}_{-0.13}$ $\rm0.20^{+0.02}_{-0.02}$
270$^\circ $ July 6, 01:36 157 935 $\rm 3.04^{+0.23}_{-0.38}$ $\rm0.19^{+0.02}_{-0.02}$
0$^\circ $ July 7, 00:32 240 477 $\rm 2.53^{+0.13}_{-0.15}$ $\rm0.10^{+0.01}_{-0.01}$
270$^\circ $ July 7, 00:53 241 760 $\rm 4.99^{+0.35}_{-1.90}$ $\rm0.21^{+0.01}_{-0.08}$
0$^\circ $ July 7, 02:20 246 965 $\rm 2.51^{+0.18}_{-0.23}$ $\rm0.10^{+0.01}_{-0.01}$
270$^\circ $ July 7, 03:01 249 430 $\rm 4.00^{+1.10}_{-0.45}$ $\rm0.16^{+0.04}_{-0.02}$


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