Occultation of 4UC 688-037111 by (328) Gudrun on 2016-12-23 Red O-: Pietro Baruffetti Optics: M200 | Method: VID | Duration: 10.13,44.02,0 Red O-: David Vizzoni Optics: M200 | Method: CCD | Duration: 10.27,43.95,0 Red O-: E. Frappa/A. Klotz Optics: M250 | Method: CCD | Duration: 6.92,43.75,0