The interactive map below shows our current prediction for the occultation by (21900) Orus on 2025 February 8 UT. The prediction is based on a Gaia eDR3 position for the star, corrected for parallax and proper motion, and the v20230506025345 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 04:44:46.9 UT. The J2000 star position is RA 09:19:48.0 (9.3300116), Dec +05:50:04 (5.834518), and its magnitude is 14.44. Orus is moving at 16.8 km/s with respect to the star and its diameter is estimated to be 60.5 km, so central chords are expected to last 3.6 seconds.
Of-date coordinates for the target star on event night are RA 09:21:07.4 (9.3520556), Dec +05:43:38 (5.727222).