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Stellar Occultation by (228139) 2009 RS33 on 2025-08-12 (20:25:10 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] : 38a9a140-ddb7-11f0-547e-65457d66e628 [observed] Occultation Date + Time : 2025-08-12 at 20:25:10 UT +/- 0.14 min [1] Object Designation : (228139) 2009 RS33 Star Designation : GDR3 4212543819894675072 Star Coordinates (ICRF) : RA = 19 12 22.0953, DE = -03 50 20.562 [2] Star Magnitudes : G = 12.16 mag, RP = 10.59 mag, BP = 15.77 mag Object Magnitude : V = 19.82 mag Estimated Magnitude Drop : 7.7 mag Estimated Max. Duration : 0.3 sec Speed of the shadow : 7.3 km/s Object Mean Diameter : 1.90 km (src: astorb) => apparent = 2 mas Apparent Motion : 0.4017 arcs/min @ PA = 227 deg Horizontal Parallax : 5.8340 arcs Dynamical Class : MBA Elongation to Moon & Sun : 77° (sunlit = 85%), Sun = 144° Cross-track uncertainty : 26.7 mas = 29 km = 15.36 path-width (1-sig) RUWE and duplicate source : 1.29 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#28 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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