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Stellar Occultation by (74422) 1999 AP28 on 2025-09-20 (00:23:09 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] : 7a80f230-ddb7-11f0-547e-9848bbfe4900 [observed]

 Occultation Date + Time   : 2025-09-20 at 00:23:09 UT +/- 0.01 min  [1]
 Object Designation        : (74422) 1999 AP28
 Star Designation          : GDR3 0342498116866866816
 Star Coordinates (ICRF)   : RA = 01 54 19.3420, DE = +37 08 14.930  [2]
 Star Magnitudes           : G = 7.69 mag, RP = 6.28 mag, BP = 10.03 mag
 Object Magnitude          : V = 19.66 mag
 Estimated Magnitude Drop  : 12.0 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 9.5 km/s
 Object Mean Diameter      : 5.1 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.2950 arcs/min @ PA = 290 deg
 Horizontal Parallax       : 3.3060 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 113° (sunlit = 3%), Sun = 132°
 Cross-track uncertainty   : 1.2 mas = 2 km = 0.45 path-width (1-sig)
 RUWE and duplicate source : 1.09 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#51
 Note                      : FP:true

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


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