Table 2: The derived expansion velocities in arcsec/day along with their uncertainties for the expanding dust cloud in the different bands. In parenthesis we report the corresponding values in km s^-1.

Filter	Expansion vel.		err
B	16.2(0.222)		0.5(0.007)
V	14.0(0.193)		0.6(0.009)
R	13.5(0.185)		0.2(0.003)
I	11.9(0.163)		0.4(0.005)