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Stellar Occultation by (6421) 1993 XS1 on 2023-08-23 (21:16:14 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] : f75c4830-ddb3-11f0-547e-f4c57d9e40d5 [observed] Occultation Date + Time : 2023-08-23 at 21:16:14 UT +/- 0.0 min [1] Object Designation : (6421) 1993 XS1 Star Designation : GDR3 6867368280689042176 Star Coordinates (ICRF) : RA = 19 57 33.7084, DE = -18 51 22.836 [2] Star Magnitudes : G = 11.14 mag, RP = 10.57 mag, BP = 11.53 mag Object Magnitude : V = 17.02 mag Estimated Magnitude Drop : 5.9 mag Estimated Max. Duration : 1.0 sec Speed of the shadow : 7.4 km/s Object Mean Diameter : 7.3 km (src: astorb) => apparent = 6 mas Apparent Motion : 0.3950 arcs/min @ PA = 239 deg Horizontal Parallax : 5.6720 arcs Dynamical Class : MBA Elongation to Moon & Sun : 64° (sunlit = 45%), Sun = 147° Cross-track uncertainty : 0.3 mas = 0 km = 0.05 path-width (1-sig) RUWE and duplicate source : 1.36 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#63 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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