How to gauge fix \k-symmetry for the super 0-brane action on AdS2×S2 in Killing gauge properly is discussed in order to find the superconformal
mechanics which describes super 0-brane probes moving on AdS2×S2.
The dependence on the coordinate frame for the proper Killing gauge is
considered and the subtleties of gauge-fixing \k-symmetry in Killing gauge
are analysed explicitly. It is found that the Killing gauge works indeed
without the imcompatibility if the magnetic charge of the super 0-brane is
nonzero.Comment: 14 pages, LaTeX2