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Stellar Occultation by (74517) 1999 FU31 on 2025-12-01 (04:50:59 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] : c9e4c760-ddb8-11f0-547e-b9592f78eb79 [observed] Occultation Date + Time : 2025-12-01 at 04:50:59 UT +/- 0.01 min [1] Object Designation : (74517) 1999 FU31 Star Designation : GDR3 3104759500969647488 Star Coordinates (ICRF) : RA = 06 31 52.6308, DE = -04 12 51.302 [2] Star Magnitudes : G = 10.43 mag, RP = 10.09 mag, BP = 10.64 mag Object Magnitude : V = 17.98 mag Estimated Magnitude Drop : 7.6 mag Estimated Max. Duration : 0.5 sec Speed of the shadow : 11.2 km/s Object Mean Diameter : 6.0 km (src: astorb) => apparent = 5 mas Apparent Motion : 0.5133 arcs/min @ PA = 220 deg Horizontal Parallax : 4.8760 arcs Dynamical Class : MBA Elongation to Moon & Sun : 85° (sunlit = 80%), Sun = 140° Cross-track uncertainty : 0.4 mas = 0 km = 0.09 path-width (1-sig) RUWE and duplicate source : 1.39 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#54 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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