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Stellar Occultation by (282198) 2001 UM166 on 2023-08-19 (21:36:53 UT)

CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.


Event Details
Occultation UUID [and db] : f05c9850-ddb3-11f0-547e-4cbafd6fa2a3 [observed] Occultation Date + Time : 2023-08-19 at 21:36:53 UT +/- 0.04 min [1] Object Designation : (282198) 2001 UM166 Star Designation : GDR3 2671285769087860608 Star Coordinates (ICRF) : RA = 21 37 10.8118, DE = -05 29 57.095 [2] Star Magnitudes : G = 13.9 mag, RP = 13.36 mag, BP = 14.27 mag Object Magnitude : V = 19.63 mag Estimated Magnitude Drop : 5.7 mag Estimated Max. Duration : 0.6 sec Speed of the shadow : 16.3 km/s Object Mean Diameter : 9.8 km (src: astorb) => apparent = 3 mas Apparent Motion : 0.3200 arcs/min @ PA = 252 deg Horizontal Parallax : 2.0920 arcs Dynamical Class : JTRO Elongation to Moon & Sun : 139° (sunlit = 11%), Sun = 172° Cross-track uncertainty : 5.3 mas = 16 km = 1.65 path-width (1-sig) RUWE and duplicate source : 0.98 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#39 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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