Orus Occultation 2022-12-16 (G* = 14.2)

The interactive map below shows our current prediction for the stellar occultation by (21900) Orus on 2022 December 16 UT. The prediction is based on a Gaia eDR3 position for the star, corrected for parallax and proper motion, and the v20221206160541 orbit estimate for Orus, which is derived from orus_20221130a.bsp. This ephemeris has a 1-sigma crosstrack uncertainty of 1.8 km and a 1-sigma downtrack uncertainty of 0.2 sec for this event.

Geocentric mid-time of the event is 01:10:49 UT. The map below shows star symbols on the predicted centerline that are labelled with the event time at that location.

The J2000 star position is RA 04:14:39.9 (4.244417), Dec +22:56:36 (22.94333), and its magnitude is 14.79. Orus is moving at 15 km/s with respect to the star and its diameter is estimated to be 51 km, so central chords are expected to last 3.3 seconds.

Of-date coordinates for the target star on event night are RA 04:16:02.1 (4.267250), Dec +22:59:59 (22.99972).

Updated: Dec 06, 2022