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Stellar Occultation by (39530) 1990 EX1 on 2023-12-22 (20:16:27 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] : 4a6ec2f0-ddb4-11f0-547e-476f8bde6cfa [observed] Occultation Date + Time : 2023-12-22 at 20:16:27 UT +/- 0.01 min [1] Object Designation : (39530) 1990 EX1 Star Designation : GDR3 3132560888696552320 Star Coordinates (ICRF) : RA = 06 41 31.0038, DE = +05 45 58.669 [2] Star Magnitudes : G = 11.65 mag, RP = 11.25 mag, BP = 11.89 mag Object Magnitude : V = 18.14 mag Estimated Magnitude Drop : 6.5 mag Estimated Max. Duration : 0.5 sec Speed of the shadow : 11.6 km/s Object Mean Diameter : 5.6 km (src: astorb) => apparent = 4 mas Apparent Motion : 0.4983 arcs/min @ PA = 262 deg Horizontal Parallax : 4.5660 arcs Dynamical Class : MBA Elongation to Moon & Sun : 63° (sunlit = 82%), Sun = 160° Cross-track uncertainty : 1.0 mas = 1 km = 0.25 path-width (1-sig) RUWE and duplicate source : 0.93 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#45 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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