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Stellar Occultation by (31817) 1999 RK134 on 2025-09-12 (02:22:06 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] : 6ae23a50-ddb7-11f0-547e-842dfbbe3e8b [observed] Occultation Date + Time : 2025-09-12 at 02:22:06 UT +/- 0.0 min [1] Object Designation : (31817) 1999 RK134 Star Designation : GDR3 3367404928735109632 Star Coordinates (ICRF) : RA = 07 10 46.8514, DE = +22 21 39.953 [2] Star Magnitudes : G = 14.37 mag, RP = 13.88 mag, BP = 14.69 mag Object Magnitude : V = 18.41 mag Estimated Magnitude Drop : 4.1 mag Estimated Max. Duration : 0.5 sec Speed of the shadow : 29.8 km/s Object Mean Diameter : 13.3 km (src: astorb) => apparent = 5 mas Apparent Motion : 0.6583 arcs/min @ PA = 101 deg Horizontal Parallax : 2.3500 arcs Dynamical Class : MBA Elongation to Moon & Sun : 58° (sunlit = 76%), Sun = 63° Cross-track uncertainty : 0.7 mas = 1 km = 0.14 path-width (1-sig) RUWE and duplicate source : 1.16 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#49 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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