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Stellar Occultation by (28240) 1999 AP21 on 2024-08-16 (20:16:51 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] : 4174ad30-ddb5-11f0-547e-fb9c9fdf2edf [observed]

 Occultation Date + Time   : 2024-08-16 at 20:16:51 UT +/- 0.01 min  [1]
 Object Designation        : (28240) 1999 AP21
 Star Designation          : GDR3 6894631118172993792
 Star Coordinates (ICRF)   : RA = 21 37 57.1040, DE = -08 28 29.150  [2]
 Star Magnitudes           : G = 13.53 mag, RP = 13.03 mag, BP = 13.86 mag
 Object Magnitude          : V = 16.94 mag
 Estimated Magnitude Drop  : 3.5 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 8.0 km/s
 Object Mean Diameter      : 3.9 km  (src: astorb) => apparent = 5 mas
 Apparent Motion           : 0.5867 arcs/min @ PA = 264 deg
 Horizontal Parallax       : 7.7590 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 40° (sunlit = 89%), Sun = 175°
 Cross-track uncertainty   : 2.7 mas = 2 km = 0.57 path-width (1-sig)
 RUWE and duplicate source : 0.99 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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