The nucleus of 103P/Hartley 2, target of the EPOXI mission

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Table 2:

2008 Observations taken with VLT+FORS2.
Date	$R_{\rm h}$	$\Delta$	$\alpha$	Filter	$t_{\rm exp}$	$N_{\rm exp}$ ^a	$m_{\rm apparent}$	$m_{\rm coma}$ ^b	$m_{\rm absolute}$	$r_{\rm N}$
May 05.2	5.7	4.7	1.6	R	74	43(23)	$23.74\pm0.06$	$25.1\pm0.3$	$16.55\pm0.06$	$\le$ $1.40\pm0.03$
May 05.3	5.7	4.7	1.6	V	74	43(34)	$24.01\pm0.07$	-	$16.81\pm0.07$	$\le$ $1.46\pm0.05$
May 06.2	5.7	4.7	1.4	I	74	43(37)	$24.31\pm0.10$	$27.1\pm1.0$	$17.12\pm0.10$	$\le$ $0.92\pm0.04$
Jun. 01.2	5.6	4.7	4.0	R	100	24(16)	$24.54\pm 0.07$	-	$17.30\pm0.09$	$\le$ $0.99\pm0.04$
Jun. 04.2	5.6	4.7	4.5	R	83	28(28)	$24.50\pm 0.04$	$25.4\pm0.2$	$17.25\pm0.04$	$\le$ $1.01\pm0.02$
Jul. 28.0	5.5	5.2	10.5	R	240	11(11)^c	$25.06\pm 0.12$	$26.2\pm0.2$	$17.41\pm0.12$	$\le$ $0.94\pm0.06$

Notes. ^(a) The number of exposures, with the number used in the stacked images (i.e. those clear of background stars) in brackets. ^(b) Coma magnitude for a steady state coma, estimated from surface brightness profile (see Snodgrass et al. 2005). ^(c) The comet was in front of background stars throughout these observations; see Sect.3.3. The quoted uncertainty on the photometry does not include the estimated $\pm$ 0.2 mag. uncertainty due to the background subtraction process.

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