Occultation of 4UC 468-139018 by (3406) Omsk on 2022-08-31 Green O+: J.J. Castellani Optics: M400 | Method: VID | Duration: 1.20 -0.04,43.62,0 Red O-: Stefano Sposetti Optics: M420 | Method: CCD | Duration: 9.02,46.23,0