The interactive map below shows our current prediction for the stellar occultation by (52246) Donaldjohanson on 2020 September 11 UT. The prediction is based on a Gaia DR2 position for the star and the v20181130000006 orbit estimate for Donaldjohanson.
Geocentric mid-time of the event is 11:43:00 UT. Star position is RA 04:28:11.2, Dec +25:20:33 (J2000), and its magnitude is 10.95. Donaldjohanson is moving at 15 km/s with respect to the star and its diameter is estimated to be 5 km, so central chords are expected to last 0.33 seconds.