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Stellar Occultation by (77894) 2001 SY263 on 2023-09-11 (22:12:42 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] : 08a8b010-ddb4-11f0-547e-a59cfbe44fc1 [observed] Occultation Date + Time : 2023-09-11 at 22:12:42 UT +/- 0.04 min [1] Object Designation : (77894) 2001 SY263 Star Designation : GDR3 1756702234644085120 Star Coordinates (ICRF) : RA = 20 57 41.9672, DE = +10 35 07.901 [2] Star Magnitudes : G = 12.4 mag, RP = 11.91 mag, BP = 12.73 mag Object Magnitude : V = 19.45 mag Estimated Magnitude Drop : 7.1 mag Estimated Max. Duration : 0.9 sec Speed of the shadow : 12.8 km/s Object Mean Diameter : 10.9 km (src: astorb) => apparent = 4 mas Apparent Motion : 0.2667 arcs/min @ PA = 243 deg Horizontal Parallax : 2.2070 arcs Dynamical Class : JTRO Elongation to Moon & Sun : 148° (sunlit = 9%), Sun = 142° Cross-track uncertainty : 7.3 mas = 21 km = 1.94 path-width (1-sig) RUWE and duplicate source : 1.0 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#37 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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