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Stellar Occultation by (1871) Astyanax on 2025-09-04 (00:37:37 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] : 60a25390-ddb7-11f0-547e-d4e3ffd941e2 [observed] Occultation Date + Time : 2025-09-04 at 00:37:37 UT +/- 0.04 min [1] Object Designation : (1871) Astyanax Star Designation : GDR3 2528684161847747456 Star Coordinates (ICRF) : RA = 00 34 34.2426, DE = -03 03 12.601 [2] Star Magnitudes : G = 13.0 mag, RP = 12.47 mag, BP = 13.37 mag Object Magnitude : V = 18.3 mag Estimated Magnitude Drop : 5.3 mag Estimated Max. Duration : 1.4 sec Speed of the shadow : 14.0 km/s Object Mean Diameter : 19.4 km (src: astorb) => apparent = 6 mas Apparent Motion : 0.2767 arcs/min @ PA = 235 deg Horizontal Parallax : 2.1040 arcs Dynamical Class : JTRO Elongation to Moon & Sun : 72° (sunlit = 84%), Sun = 154° Cross-track uncertainty : 2.7 mas = 8 km = 0.42 path-width (1-sig) RUWE and duplicate source : 0.97 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#62 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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