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Stellar Occultation by (194742) 2001 YN20 on 2025-12-09 (20:52:18 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] : d2f1fa80-ddb8-11f0-547e-acb0e2bd2b81 [observed]

 Occultation Date + Time   : 2025-12-09 at 20:52:18 UT +/- 0.11 min  [1]
 Object Designation        : (194742) 2001 YN20
 Star Designation          : GDR3 3426192138981965568
 Star Coordinates (ICRF)   : RA = 06 04 13.9370, DE = +23 55 10.406  [2]
 Star Magnitudes           : G = 11.15 mag, RP = 10.35 mag, BP = 11.83 mag
 Object Magnitude          : V = 19.8 mag
 Estimated Magnitude Drop  : 8.7 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 11.9 km/s
 Object Mean Diameter      : 3.5 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.4167 arcs/min @ PA = 268 deg
 Horizontal Parallax       : 3.7210 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 53° (sunlit = 70%), Sun = 167°
 Cross-track uncertainty   : 24.0 mas = 41 km = 11.75 path-width (1-sig)
 RUWE and duplicate source : 0.96 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL28
 Note                      : FP:true

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


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