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Stellar Occultation by (20533) Irmabonham on 2023-05-09 (23:00:30 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] : 9631b590-ddb3-11f0-547e-e349fefda083 [observed] Occultation Date + Time : 2023-05-09 at 23:00:30 UT +/- 0.0 min [1] Object Designation : (20533) Irmabonham Star Designation : GDR3 6262363313177152128 Star Coordinates (ICRF) : RA = 15 56 31.2314, DE = -16 13 15.445 [2] Star Magnitudes : G = 12.97 mag, RP = 12.45 mag, BP = 13.32 mag Object Magnitude : V = 17.98 mag Estimated Magnitude Drop : 5.0 mag Estimated Max. Duration : 0.5 sec Speed of the shadow : 10.4 km/s Object Mean Diameter : 5.1 km (src: astorb) => apparent = 4 mas Apparent Motion : 0.4867 arcs/min @ PA = 281 deg Horizontal Parallax : 4.9940 arcs Dynamical Class : MBA Elongation to Moon & Sun : 44° (sunlit = 79%), Sun = 168° Cross-track uncertainty : 0.7 mas = 0 km = 0.18 path-width (1-sig) RUWE and duplicate source : 1.06 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#53 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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