Occultation of 4UC 454-000904 by (171) Ophelia on 2019-09-09 Green O+: W. Nobel et al Optics: M460 | Method: VID | Duration: 7.68 4.48,52.16,0 Green O+: Jan-Maarten Winkel Optics: M310 | Method: VID | Duration: 9.40 6.26,51.90,0 Green O+: Henk De Groot Optics: M356 | Method: VID | Duration: 10.36 5.80,51.83,0 Red O-: O. Schreurs et al Optics: M406 | Method: VID | Duration: 5.44,50.52,0 Red O-: Roland Boninsegna Optics: M400 | Method: VID | Duration: 4.58,50.09,0