Occultation of 4UC 420-138568 by (219) Thusnelda on 2017-09-27 Red O-: Pietro Baruffetti Optics: M200 | Method: VID | Duration: 10.13,44.02,0 Red O-: E. Frappa/A. Klotz Optics: M250 | Method: CCD | Duration: 6.92,43.75,0