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Stellar Occultation by (21541) Friskop on 2023-06-23 (20:46:02 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] : bc3575b0-ddb3-11f0-547e-c5197f37f861 [observed] Occultation Date + Time : 2023-06-23 at 20:46:02 UT +/- 0.0 min [1] Object Designation : (21541) Friskop Star Designation : GDR3 4155413814250528128 Star Coordinates (ICRF) : RA = 18 42 16.4384, DE = -09 03 09.160 [2] Star Magnitudes : G = 4.61 mag, RP = 4.31 mag, BP = 4.82 mag Object Magnitude : V = 18.23 mag Estimated Magnitude Drop : 13.6 mag Estimated Max. Duration : 0.5 sec Speed of the shadow : 11.0 km/s Object Mean Diameter : 5.1 km (src: astorb) => apparent = 4 mas Apparent Motion : 0.4900 arcs/min @ PA = 266 deg Horizontal Parallax : 4.7450 arcs Dynamical Class : MBA Elongation to Moon & Sun : 123° (sunlit = 27%), Sun = 164° Cross-track uncertainty : 0.9 mas = 1 km = 0.24 path-width (1-sig) RUWE and duplicate source : 0.76 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#50 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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