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Stellar Occultation by (74442) 1999 CJ9 on 2025-09-25 (03:22:53 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] : 75528a70-ddb8-11f0-547e-0eb2ffaff432 [observed] Occultation Date + Time : 2025-09-25 at 03:22:53 UT +/- 0.08 min [1] Object Designation : (74442) 1999 CJ9 Star Designation : GDR3 0055851862092255360 Star Coordinates (ICRF) : RA = 03 23 01.6548, DE = +17 55 50.581 [2] Star Magnitudes : G = 13.49 mag, RP = 13.01 mag, BP = 13.81 mag Object Magnitude : V = 19.91 mag Estimated Magnitude Drop : 6.4 mag Estimated Max. Duration : 1.7 sec Speed of the shadow : 2.4 km/s Object Mean Diameter : 4.0 km (src: astorb) => apparent = 2 mas Apparent Motion : 0.0817 arcs/min @ PA = 261 deg Horizontal Parallax : 3.6180 arcs Dynamical Class : MBA Elongation to Moon & Sun : 165° (sunlit = 10%), Sun = 129° Cross-track uncertainty : 2.0 mas = 3 km = 0.88 path-width (1-sig) RUWE and duplicate source : 1.1 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#47 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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