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Stellar Occultation by (12582) 1999 RY34 on 2025-09-17 (20:35:54 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] : 74c40610-ddb8-11f0-547e-33d8f7bd7bb2 [observed]

 Occultation Date + Time   : 2025-09-17 at 20:35:54 UT +/- 0.0 min  [1]
 Object Designation        : (12582) 1999 RY34
 Star Designation          : GDR3 4076891705935202304
 Star Coordinates (ICRF)   : RA = 18 27 59.9120, DE = -25 40 56.519  [2]
 Star Magnitudes           : G = 9.62 mag, RP = 9.35 mag, BP = 9.76 mag
 Object Magnitude          : V = 18.55 mag
 Estimated Magnitude Drop  : 8.9 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 11.1 km/s
 Object Mean Diameter      : 5.8 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.4350 arcs/min @ PA = 85 deg
 Horizontal Parallax       : 4.1840 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 148° (sunlit = 16%), Sun = 101°
 Cross-track uncertainty   : 0.4 mas = 0 km = 0.11 path-width (1-sig)
 RUWE and duplicate source : 0.67 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#59
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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