Occultation of 4UC 427-103028 by (256) Walpurga on 2017-08-12 Green O+: Alberto Ossola Optics: M230 | Method: VID | Duration: 1.12 8.92,46.00,0 Green O+: E. Frappa/A. Klotz Optics: M250 | Method: CCD | Duration: 5.67 6.92,43.75,0 Red O-: Stefano Sposetti Optics: M280 | Method: VID | Duration: 9.02,46.23,0 Red O-: Andrea Manna Optics: M200 | Method: VID | Duration: 8.92,46.18,0 Red O-: Michel Bonnardeau Optics: M203 | Method: CCD | Duration: 5.68,44.76,0