Occultation of TYC 1936-00635-1 by (16539) 1991 PY12 on 2023-09-17 Red O-: Michal Rottenborn Optics: M254 | Method: VID | Duration: 13.33,49.71,0 Red O-: Jiri Polak Optics: M300 | Method: VID | Duration: 13.32,49.69,0