  The existence of the $J^p=1/2^+$ narrow resonance predicted by the chiral
soliton model has been investigated by utilizing the new kaon photoproduction
data. For this purpose, we have constructed two phenomenological models, which
are able to describe kaon photoproduction from threshold up to W=1730 MeV. By
varying the resonance mass, width, and $K\Lambda$ branching ratio in this
energy range we found that the most convincing mass of this resonance is 1650
MeV. Using this result we estimate the masses of other antidecuplet family
members.
