  The orbital and spin moment of the Co2+ ion in CoO has been calculated within
the quasi-atomic approach with taking into account the intra-atomic spin-orbit
coupling. The orbital moment of 1.38 \mu_{B} amounts at 0 K, in the
magnetically-ordered state, to more than 34% of the total moment (4.02 \mu_{B})
and yields the L/S ratio of 1.04, close to the experimental value.
  PACS No: 71.70.E; 75.10.D Keywords: 3d magnetism, crystal field, spin-orbit
coupling, orbital moment, CoO
