Table 3: Coma structure geometry caused by normal activity of comet 9P/Tempel 1 around the time of the DI event. Near-nucleus position angles PA, curvature and minimum extension are determined from BVRI images of the comet obtained between 4 and 8 July 2005. The results are cross-checked with data obtained through narrowband filters during the same time interval. The jet-like structures are labeled in Fig. 1. Accuracy of the PA values is 5 deg. Active regions, tentatively associated with the jets, are labeled AR1, AR2, AR3a, AR3b, AR3c, and AR4. Abbreviations and notes: C = clockwise curvature, CC = counterclockwise curvature, S = straight, no curvature. (*) Structure B may also be due to comet tail phenomena. (**) Structure C is detached from the nucleus, but overlaps with jet D at an projected nucleus distance of about 3500 km. It extends almost parallel to structure B into tail direction. (***) Structures G, H, I evolved from the nucleus at about the same PA, but show different curvatures which indicates that they may originate from 3 different active regions at the nucleus with slightly different latitudes: G located slightly South of H and the latter being slightly South of I. The PA difference between GHI and the projected rotation axis suggests that the related active regions may be located close to the equator of the nucleus.

Structure	Nuc. PA	Curvature	Min. extension	Active
	(deg)		(km)	Region
A	0	CC	27 000	AR4
B(*)	110	S	47 000	AR3b
C(**)	-	S	47 000	AR2
D	155	C	58 000	AR1
E	195	C	43 000	AR1
F	225	C	23 000	AR2
G(***)	285	C	18 000	AR3c
H(***)	285	S	17 000	AR3b
I(***)	285	CC	25 000	AR3a