The distant activity of the Long Period Comets C/2003 O1 (LINEAR) and C/2004 K1 (Catalina)

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Table 4:

Observing conditions.
Comet	Observation time (UT)^a	r (AU)^b	$\Delta$ (AU)^c	$\alpha$ ( $^{\circ }$ )^d	PA (^o) ^e	Total exposure time ^f	Airmass^g
C/2003 O1 (LINEAR)	2005 May 16 02:13	7.39	6.89	9.96	180.3	3000	1.094
C/2004 K1 (Catalina)	2005 May 15 23:51	3.43	2.57	10.3	204.3	1500	1.139

^a UT time in the middle of the total exposure time (coadded image). ^b Heliocentric distance. ^c Geocentric distance. ^d Sun-target-observer angle. ^e Position angle of the extended Sun-target radius vector. ^f Resulting from coadding of the individual frames. ^g In the middle of the total exposure time (coadded image).

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