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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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