Occultation of 4UC 436-053810 by (54) Alexandra on 2022-06-11 Green O+: O. Schreurs et al Optics: M406 | Method: VID | Duration: 6.08 5.44,50.52,0 Red O-: Arnaud Leroy Optics: M355 | Method: CCD | Duration: 2.74,48.74,0