Occultation of 4UC 550-017182 by (522) Helga on 2020-09-19 Green O+: Andreas Tazreiter Optics: M406 | Method: VID | Duration: 8.00 14.73,47.90,0 Red O-: Jiri Kubanek Optics: M203 | Method: CCD | Duration: 13.75,49.74,0 Red O-: Michal Rottenborn Optics: M303 | Method: CCD | Duration: 13.33,49.71,0 Red O-: Jiri Polak Optics: M303 | Method: CCD | Duration: 13.32,49.69,0