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Stellar Occultation by (74789) 1999 SY5 on 2024-12-22 (04:05:59 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] : c6f96ea0-ddb5-11f0-547e-9574cdefd77e [observed] Occultation Date + Time : 2024-12-22 at 04:05:59 UT +/- 0.01 min [1] Object Designation : (74789) 1999 SY5 Star Designation : GDR3 3060600365220972928 Star Coordinates (ICRF) : RA = 07 27 45.5230, DE = -03 10 01.362 [2] Star Magnitudes : G = 13.73 mag, RP = 13.23 mag, BP = 13.93 mag Object Magnitude : V = 16.22 mag Estimated Magnitude Drop : 2.6 mag Estimated Max. Duration : 0.5 sec Speed of the shadow : 9.6 km/s Object Mean Diameter : 4.6 km (src: astorb) => apparent = 7 mas Apparent Motion : 0.9133 arcs/min @ PA = 321 deg Horizontal Parallax : 10.1200 arcs Dynamical Class : MBA Elongation to Moon & Sun : 62° (sunlit = 57%), Sun = 146° Cross-track uncertainty : 4.4 mas = 2 km = 0.60 path-width (1-sig) RUWE and duplicate source : 25.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#52 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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