The interactive map below shows our current prediction for the occultation by (21900) Orus on 2026 March 6 UT. The prediction is based on a Gaia eDR3 position for the star, corrected for parallax and proper motion, and the v20230506031915 orbit estimate for Orus, which is derived from orus_20221130a.bsp. This ephemeris has a 1-sigma crosstrack uncertainty of 10.0 km and a 1-sigma downtrack uncertainty of 0.1 sec for this event (these are placeholder values).
The geocentric mid-time of the event is 06:53:40.7 UT. The J2000 star position is RA 11:31:13.9 (11.5205170), Dec -08:12:57 (-8.215864), and its magnitude is 14.33. Orus is moving at 16.2 km/s with respect to the star and its diameter is estimated to be 60.5 km, so central chords are expected to last 3.7 seconds.
Of-date coordinates for the target star on event night are RA 11:32:33.7 (11.5426944), Dec -08:21:38 (-8.360556).