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Stellar Occultation by (2230) Yunnan on 2025-08-12 (20:08:46 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] : 97dd2960-ddb8-11f0-547e-43d66edf7c92 [observed] Occultation Date + Time : 2025-08-12 at 20:08:46 UT +/- 0.02 min [1] Object Designation : (2230) Yunnan Star Designation : GDR3 4070829862149313408 Star Coordinates (ICRF) : RA = 18 00 03.1107, DE = -20 51 14.681 [2] Star Magnitudes : G = 13.98 mag, RP = 12.75 mag, BP = 15.66 mag Object Magnitude : V = 17.06 mag Estimated Magnitude Drop : 3.1 mag Estimated Max. Duration : 4.5 sec Speed of the shadow : 2.8 km/s Object Mean Diameter : 12.6 km (src: astorb) => apparent = 8 mas Apparent Motion : 0.1050 arcs/min @ PA = 242 deg Horizontal Parallax : 4.0120 arcs Dynamical Class : MBA Elongation to Moon & Sun : 96° (sunlit = 85%), Sun = 130° Cross-track uncertainty : 0.2 mas = 0 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.89 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#70 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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