Occultation of 4UC 527-046590 by (5849) 1990 HF1 on 2017-01-20 Red O-: Stefano Sposetti Optics: M280 | Method: VID | Duration: 9.02,46.23,0 Red O-: David Vizzoni Optics: M200 | Method: CCD | Duration: 10.27,43.95,0