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Stellar Occultation by (210548) 1999 RY254 on 2025-11-17 (20:37:29 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] : ba0e36a0-ddb8-11f0-547e-36d57f57f24e [observed] Occultation Date + Time : 2025-11-17 at 20:37:29 UT +/- 0.35 min [1] Object Designation : (210548) 1999 RY254 Star Designation : GDR3 2431525129663692544 Star Coordinates (ICRF) : RA = 00 25 34.8865, DE = -06 25 09.548 [2] Star Magnitudes : G = 10.45 mag, RP = 10.06 mag, BP = 10.69 mag Object Magnitude : V = 19.62 mag Estimated Magnitude Drop : 9.2 mag Estimated Max. Duration : 0.4 sec Speed of the shadow : 5.0 km/s Object Mean Diameter : 1.90 km (src: astorb) => apparent = 2 mas Apparent Motion : 0.3100 arcs/min @ PA = 11 deg Horizontal Parallax : 6.5860 arcs Dynamical Class : MBA Elongation to Moon & Sun : 151° (sunlit = 5%), Sun = 127° Cross-track uncertainty : 17.3 mas = 16 km = 8.82 path-width (1-sig) RUWE and duplicate source : 4.23 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#38 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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