  We construct an asymptotic conserved charge for a current that has been
defined using Killing-Yano tensors. We then calculate the corresponding
conserved charges of of the Kerr and AdS-Kerr black holes, and their
higher-dimensional generalizations, Myers-Perry and Gibbons-L\"u-Page-Pope
black holes. The new charges all turn out to be proportional to the angular
momenta of their parent black holes.
