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Stellar Occultation by (23) Thalia on 2025-09-19 (18:39:44 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] : 7475db80-ddb7-11f0-547e-28614bb6ba94 [observed] Occultation Date + Time : 2025-09-19 at 18:39:44 UT +/- 0.01 min [1] Object Designation : (23) Thalia Star Designation : GDR3 4046297038978026240 Star Coordinates (ICRF) : RA = 18 17 19.1871, DE = -31 20 12.225 [2] Star Magnitudes : G = 12.4 mag, RP = 11.86 mag, BP = 12.77 mag Object Magnitude : V = 12.92 mag Estimated Magnitude Drop : 1.0 mag Estimated Max. Duration : 9.7 sec Speed of the shadow : 11.1 km/s Object Mean Diameter : 107.5 km (src: astorb) => apparent = 51 mas Apparent Motion : 0.3150 arcs/min @ PA = 80 deg Horizontal Parallax : 3.0110 arcs Dynamical Class : MBA Elongation to Moon & Sun : 120° (sunlit = 4%), Sun = 97° Cross-track uncertainty : 1.0 mas = 2 km = 0.02 path-width (1-sig) RUWE and duplicate source : 0.73 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#131 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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