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Stellar Occultation by (255179) 2005 UD242 on 2025-10-01 (21:56:28 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] : 7b817cd0-ddb8-11f0-547e-adf86e7fbe6f [observed]

 Occultation Date + Time   : 2025-10-01 at 21:56:28 UT +/- 0.14 min  [1]
 Object Designation        : (255179) 2005 UD242
 Star Designation          : GDR3 2666879819836798464
 Star Coordinates (ICRF)   : RA = 21 55 20.4993, DE = -07 16 42.560  [2]
 Star Magnitudes           : G = 13.12 mag, RP = 12.43 mag, BP = 13.68 mag
 Object Magnitude          : V = 20.83 mag
 Estimated Magnitude Drop  : 7.7 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 5.7 km/s
 Object Mean Diameter      : 2.1 km  (src: astorb) => apparent = 1 mas
 Apparent Motion           : 0.2217 arcs/min @ PA = 245 deg
 Horizontal Parallax       : 4.1270 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 29° (sunlit = 69%), Sun = 139°
 Cross-track uncertainty   : 22.3 mas = 34 km = 16.41 path-width (1-sig)
 RUWE and duplicate source : 0.93 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#24
 Note                      : FP:true

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


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