Table 6: Differences of differential magnitude and colours over two years (1999-2001).

HIP		)	)	))	)	))	)	))
2552	0.011	0.006	0.010	0.013	0.000	0.008	0.037	0.008
86282	-0.004	0.002	-0.011	0.004	-0.042	0.026	-0.024	0.004
110893	0.011	0.015	-	-	0.001	0.032	0.055	0.046