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Stellar Occultation by (306821) 2001 QU266 on 2025-09-18 (23:07:46 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] : 72578f60-ddb7-11f0-547e-f8a5f77fed02 [observed]

 Occultation Date + Time   : 2025-09-18 at 23:07:46 UT +/- 0.04 min  [1]
 Object Designation        : (306821) 2001 QU266
 Star Designation          : GDR3 4218852263537425280
 Star Coordinates (ICRF)   : RA = 20 19 10.8074, DE = -05 07 29.343  [2]
 Star Magnitudes           : G = 14.07 mag, RP = 13.53 mag, BP = 14.44 mag
 Object Magnitude          : V = 19.66 mag
 Estimated Magnitude Drop  : 5.6 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 7.8 km/s
 Object Mean Diameter      : 2.3 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.4100 arcs/min @ PA = 167 deg
 Horizontal Parallax       : 5.5590 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 157° (sunlit = 8%), Sun = 128°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.35 path-width (1-sig)
 RUWE and duplicate source : 0.96 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#40
 Note                      : FP:true

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


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