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Stellar Occultation by (16393) 1981 QS on 2026-09-22 (18:45:20 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] : 3a29c210-d9b1-11f1-43f3-94e4599f4cc2 [observed]

 Occultation Date + Time   : 2026-09-22 at 18:45:20 UT +/- 0.0 min  [1]
 Object Designation        : (16393) 1981 QS
 Star Designation          : GDR3 4119492868071998080
 Star Coordinates (ICRF)   : RA = 17 51 41.1290, DE = -19 22 16.389  [2]
 Star Magnitudes           : G = 12.87 mag, RP = 12.01 mag, BP = 13.64 mag
 Object Magnitude          : V = 19.09 mag
 Estimated Magnitude Drop  : 6.2 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 17.1 km/s
 Object Mean Diameter      : 4.6 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.6483 arcs/min @ PA = 100 deg
 Horizontal Parallax       : 4.0180 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 45° (sunlit = 84%), Sun = 88°
 Cross-track uncertainty   : 0.2 mas = 0 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 0.82 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL66
 Note                      : FP:true

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


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