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Stellar Occultation by (271361) 2003 XJ18 on 2025-12-31 (23:27:47 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] : 54ad2b00-d997-11f1-43f3-ef515dee13f5 [observed]

 Occultation Date + Time   : 2025-12-31 at 23:27:47 UT +/- 0.04 min  [1]
 Object Designation        : (271361) 2003 XJ18
 Star Designation          : GDR3 0255854745175012864
 Star Coordinates (ICRF)   : RA = 04 54 40.0762, DE = +48 42 16.547  [2]
 Star Magnitudes           : G = 11.34 mag, RP = 10.49 mag, BP = 12.1 mag
 Object Magnitude          : V = 19.97 mag
 Estimated Magnitude Drop  : 8.6 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 11.1 km/s
 Object Mean Diameter      : 2.9 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.4350 arcs/min @ PA = 262 deg
 Horizontal Parallax       : 4.1800 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 24° (sunlit = 92%), Sun = 146°
 Cross-track uncertainty   : 7.7 mas = 11 km = 4.05 path-width (1-sig)
 RUWE and duplicate source : 1.38 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL31
 Note                      : FP:true

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


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