Occultation of 4UC 558-004947 by (2120) Tyumenia on 2021-09-13 Green O+: P. Svozil et al Optics: M300 | Method: CCD | Duration: 7.35 18.00,49.34,0 Red O-: Peter Nosal Optics: M250 | Method: CCD | Duration: 19.30,48.56,0