Table 8:

Pluto DE418 and plu017 ephemerides offsets with time.

Event	Central	Observed - Ephem.		Note
	instant	cos
	years	mas	mas
2005 July 11	2005.5254	+35	-26	p
2006 April 10	2006.2731	-73	+00	p
2006 June 12	2006.4468	+63	+19	p
2006 June 12	2006.4468	+49	+15	1
2006 June 12	2006.4468	+56	+17	a
2007 March 18	2007.2100	-48	+30	p
2007 March 18	2007.2100	-46	+30	2
2007 March 18	2007.2100	-47	+30	a
2007 May 12	2007.3597	-38	+36	p
2007 June 09	2007.4371	-14	+53	p
2007 June 14	2007.4499	-49	+57	p
2007 July 31	2007.5799	+42	+64	p
2007 July 31	2007.5799	+42	+61	3
2007 July 31	2007.5799	+42	+62	a
2008 June 22	2008.4803	+37	+96	p
2008 June 24	2008.4758	+73	+63	p
2008 June 24	2008.4758	+73	+73	p
2008 August 25	2008.6494	+02	+53	p
2008 August 25	2008.6494	+04	+52	4
2008 August 25	2008.6494	+03	+52	a

Notes. DE418 and plu017 ephemerides offsets of Pluto with time. Offsets marked ``p'' were determined from fittings of past occultations in 2005-2008, taking as reference LNA-based star positions (Table 7) derived for these events. Four extra offsets from four common events were also independently measured (``1'' = Young et al. 2008; ``2'' = Young et al. 2007; ``3'' = Olkin et al., in prep.; ``4'' = Buie et al. 2009); for these common occultations, averaged offsets with the corresponding ``p'' values are marked ``a''. The offsets are in the sense observed minus ephemeris. For the 2006 April 10 event, no occultation occurred (this was actually predicted), but the offset could be derived (at 20 mas level) due to high resolution adaptative optics observations of Pluto and the star made at the ESO-VLT 8 m Telescope UT4 (Yepun) at Paranal Observatory, Chile, with the NACO instrument. The event of 2005 July 11 involved Charon, while the event of 2008 June 22 involved both Pluto and Charon occulting the same star. In all other cases, the events concern stellar occultations by Pluto alone. For the double 2008 June 22 event, only one ephemeris offset was considered for (, ), as both Pluto/Charon occultations furnish identical values within 1 mas. For the 2008 June 24 occultation by Pluto, two ephemeris offsets were used from two possible solutions. There was only one cord observed in Hawaii, but the event was near central with the two possible solutions only 10 mas apart from each other in the perpendicular direction of motion (mostly in declination).