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Stellar Occultation by (82781) 2001 QX18 on 2023-08-24 (19:22:15 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] : f8197db0-ddb3-11f0-547e-be8476b76f6f [observed]

 Occultation Date + Time   : 2023-08-24 at 19:22:15 UT +/- 0.1 min  [1]
 Object Designation        : (82781) 2001 QX18
 Star Designation          : GDR3 6871776360245187072
 Star Coordinates (ICRF)   : RA = 19 43 04.6227, DE = -16 40 57.970  [2]
 Star Magnitudes           : G = 13.54 mag, RP = 13.0 mag, BP = 13.92 mag
 Object Magnitude          : V = 19.56 mag
 Estimated Magnitude Drop  : 6.0 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 8.1 km/s
 Object Mean Diameter      : 4.3 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.2867 arcs/min @ PA = 243 deg
 Horizontal Parallax       : 3.7450 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 49° (sunlit = 54%), Sun = 143°
 Cross-track uncertainty   : 20.0 mas = 34 km = 7.92 path-width (1-sig)
 RUWE and duplicate source : 1.01 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#53
 Note                      : FP:true

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


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