English: Same as Fig. 3 for the 2017 July 23 event. The side panels are numbered as follows: Cerro Paranal (1), Tolar Grande (2), La Silla (3), Observatório Pico dos Dias (4), and Cerro Tololo (5). The observations on La Silla were made using the Danish telescope dual experiment in the visual (3.1) and red bands (3.2), and using a 1 m telescope (3.3). Left panels: first detection (immersion) at each station. Right panels: second detections (emersion). The observationson Cerro Tololo grazed over C1R, and were made using the SARA (5.1) and PROMPT (5.2). For the sake of clarity, some redundant chords were visually suppressed.