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Stellar Occultation by (121711) 1999 XW112 on 2026-08-30 (19:57:20 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] : d9f36560-d9ae-11f1-43f3-e7551777fcdc [observed]

 Occultation Date + Time   : 2026-08-30 at 19:57:20 UT +/- 0.02 min  [1]
 Object Designation        : (121711) 1999 XW112
 Star Designation          : GDR3 4135064190435584512
 Star Coordinates (ICRF)   : RA = 17 24 39.8653, DE = -16 55 41.980  [2]
 Star Magnitudes           : G = 14.65 mag, RP = 14.04 mag, BP = 15.09 mag
 Object Magnitude          : V = 18.72 mag
 Estimated Magnitude Drop  : 4.1 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 9.9 km/s
 Object Mean Diameter      : 5.4 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.3917 arcs/min @ PA = 58 deg
 Horizontal Parallax       : 4.1950 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 108° (sunlit = 92%), Sun = 104°
 Cross-track uncertainty   : 4.3 mas = 6 km = 1.21 path-width (1-sig)
 RUWE and duplicate source : 0.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL34
 Note                      : FP:true

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


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