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Stellar Occultation by (41341) 1999 YZ21 on 2026-09-24 (20:48:30 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] : 91af2750-d9b1-11f1-43f3-52ad7fe79b68 [observed]

 Occultation Date + Time   : 2026-09-24 at 20:48:30 UT +/- 0.02 min  [1]
 Object Designation        : (41341) 1999 YZ21
 Star Designation          : GDR3 4107199675242803328
 Star Coordinates (ICRF)   : RA = 18 45 16.2239, DE = -10 13 53.234  [2]
 Star Magnitudes           : G = 13.93 mag, RP = 12.94 mag, BP = 14.84 mag
 Object Magnitude          : V = 18.89 mag
 Estimated Magnitude Drop  : 5.0 mag
 Estimated Max. Duration   : 0.6 sec
 Speed of the shadow       : 12.3 km/s
 Object Mean Diameter      : 6.9 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.3917 arcs/min @ PA = 104 deg
 Horizontal Parallax       : 3.3770 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 59° (sunlit = 96%), Sun = 99°
 Cross-track uncertainty   : 1.7 mas = 3 km = 0.47 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL51
 Note                      : FP:true

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


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