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Stellar Occultation by (128215) 2003 SL77 on 2025-08-15 (20:44:09 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] : 40ca2a70-ddb7-11f0-547e-8b911f7b2466 [observed] Occultation Date + Time : 2025-08-15 at 20:44:09 UT +/- 0.14 min [1] Object Designation : (128215) 2003 SL77 Star Designation : GDR3 4098690559115636096 Star Coordinates (ICRF) : RA = 18 41 57.2745, DE = -17 48 19.429 [2] Star Magnitudes : G = 14.92 mag, RP = 14.21 mag, BP = 15.43 mag Object Magnitude : V = 18.9 mag Estimated Magnitude Drop : 4.0 mag Estimated Max. Duration : 2.2 sec Speed of the shadow : 1.4 km/s Object Mean Diameter : 3.0 km (src: astorb) => apparent = 3 mas Apparent Motion : 0.0750 arcs/min @ PA = 292 deg Horizontal Parallax : 5.9020 arcs Dynamical Class : MBA Elongation to Moon & Sun : 128° (sunlit = 54%), Sun = 136° Cross-track uncertainty : 2.1 mas = 2 km = 0.76 path-width (1-sig) RUWE and duplicate source : 1.85 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#40 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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