Occultation of 4UC 601-042377 by (3339) Treshnikov on 2021-12-18 Yellow O?: Jean Bourgeois Optics: M200 | Method: VID | Duration: 1.92 5.04,50.09,0 Yellow O?: Roland Boninsegna Optics: M400 | Method: VID | Duration: 0.64 4.58,50.09,0