Occultation of 4UC 371-181139 by (334) Chicago on 2022-04-21 Green O+: Simon Kidd Optics: M350 | Method: CCD | Duration: 7.84 -0.06,51.95,0 Green O+: Olivier Schreurs Optics: M406 | Method: VID | Duration: 5.76 5.44,50.52,0