Occultation of 4UC 415-091455 by (256) Walpurga on 2022-04-22 Green O+: Peter Nosal Optics: M250 | Method: CCD | Duration: 4.75 19.30,48.56,0 Red O-: Peter Delincak Optics: M400 | Method: CCD | Duration: 18.70,49.40,0