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Stellar Occultation by (6857) Castelli on 2025-10-03 (20:54:12 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] : 80869530-ddb8-11f0-547e-02547f2d36b3 [observed] Occultation Date + Time : 2025-10-03 at 20:54:12 UT +/- 0.0 min [1] Object Designation : (6857) Castelli Star Designation : GDR3 6877079712842870528 Star Coordinates (ICRF) : RA = 20 03 22.2145, DE = -16 18 38.141 [2] Star Magnitudes : G = 12.12 mag, RP = 11.12 mag, BP = 13.14 mag Object Magnitude : V = 18.06 mag Estimated Magnitude Drop : 6.0 mag Estimated Max. Duration : 0.4 sec Speed of the shadow : 11.1 km/s Object Mean Diameter : 4.8 km (src: astorb) => apparent = 4 mas Apparent Motion : 0.5800 arcs/min @ PA = 69 deg Horizontal Parallax : 5.5730 arcs Dynamical Class : MBA Elongation to Moon & Sun : 28° (sunlit = 86%), Sun = 109° Cross-track uncertainty : 1.0 mas = 1 km = 0.24 path-width (1-sig) RUWE and duplicate source : 1.05 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#65 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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