The interactive map below shows our current prediction for the stellar occultation by (3548) Eurybates on 2021 December 9 UT. The prediction is based on a Gaia DR2 position for the star, corrected for parallax and proper motion, and the v20210113214920 orbit estimate for Eurybates, which has a 1-sigma cross-track uncertainty of 14.5 km.
Geocentric mid-time of the event is 18:15:48 UT. Star position is RA 03:28:52.1, Dec +21:49:25 (J2000), and its magnitude is 13.28. Eurybates is moving at 14 km/s with respect to the star and its diameter is estimated to be 66 km, so central chords are expected to last 4.8 seconds.