Patroclus Occultation 2024-08-11 (G* = 10.8)

The interactive map below shows our current prediction for the occultation by (617) Patroclus-Menoetius on 2024 August 11 UT. The prediction is based on a Gaia eDR3 position for the star, corrected for parallax and proper motion, and the v20230503204716 orbit estimate for Patroclus-Menoetius, which is derived from patroclus_20220708a_5occ1.bsp (barycenter) and pm5_ccloud1.bsp (mutual orbit). 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 10:47:22.5 UT. The J2000 star position is RA 01:08:10.1 (1.1361398), Dec -13:06:28 (-13.107781), and its magnitude is 13.39. Patroclus and Menoetius are moving at 5.2 km/s with respect to the star and their diameters are estimated to be 113 and 108 km, respectively, so central chords are expected to last 21.7 seconds for Patroclus and 20.8 seconds for Menoetius.

Of-date coordinates for the target star on event night are RA 01:09:23.5 (1.1565278), Dec -12:58:37 (-12.976944).

Updated: Jun 13, 2023