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Stellar Occultation by (325703) 2009 UL57 on 2025-12-14 (21:52:09 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] : daef4440-ddb8-11f0-547e-d2c1d59007f2 [observed] Occultation Date + Time : 2025-12-14 at 21:52:09 UT +/- 0.2 min [1] Object Designation : (325703) 2009 UL57 Star Designation : GDR3 0077132772208655232 Star Coordinates (ICRF) : RA = 02 09 15.8038, DE = +13 31 43.495 [2] Star Magnitudes : G = 9.96 mag, RP = 8.99 mag, BP = 10.93 mag Object Magnitude : V = 21.08 mag Estimated Magnitude Drop : 11.1 mag Estimated Max. Duration : 0.4 sec Speed of the shadow : 6.3 km/s Object Mean Diameter : 2.4 km (src: astorb) => apparent = 1 mas Apparent Motion : 0.2083 arcs/min @ PA = 213 deg Horizontal Parallax : 3.4840 arcs Dynamical Class : MBA Elongation to Moon & Sun : 172° (sunlit = 22%), Sun = 132° Cross-track uncertainty : 17.7 mas = 32 km = 13.50 path-width (1-sig) RUWE and duplicate source : 1.79 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#31 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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