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Stellar Occultation by (42712) 1998 QX28 on 2025-09-12 (21:14:45 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] : 6b27a7c0-ddb7-11f0-547e-a88e38e67b7b [observed]

 Occultation Date + Time   : 2025-09-12 at 21:14:45 UT +/- 0.06 min  [1]
 Object Designation        : (42712) 1998 QX28
 Star Designation          : GDR3 4253982076755635712
 Star Coordinates (ICRF)   : RA = 18 55 40.6565, DE = -05 56 29.116  [2]
 Star Magnitudes           : G = 13.3 mag, RP = 12.0 mag, BP = 15.26 mag
 Object Magnitude          : V = 20.05 mag
 Estimated Magnitude Drop  : 6.7 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 9.5 km/s
 Object Mean Diameter      : 4.3 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.2967 arcs/min @ PA = 159 deg
 Horizontal Parallax       : 3.3290 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 131° (sunlit = 68%), Sun = 113°
 Cross-track uncertainty   : 0.4 mas = 0 km = 0.18 path-width (1-sig)
 RUWE and duplicate source : 1.22 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#36
 Note                      : FP:true

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


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