Occultation of 4UC 506-001691 by (917) Lyka on 2018-09-15 Green O+: Malcolm Jennings Optics: M276 | Method: VID | Duration: 8.00 -0.07,51.32,0 Red O-: O. Schreurs et al Optics: M406 | Method: VID | Duration: 5.44,50.52,0