Occultation of UCAC4 551-045952 by (-) 2012 YU21 on 2025-01-31 Red O-: Deborah Smith Optics: M280 | Method: CCD | Duration: -3.04,37.49,0 Red O-: Deborah Smith Optics: M300 | Method: CCD | Duration: -2.54,37.11,0