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Stellar Occultation by (189753) 2001 YS127 on 2025-11-04 (19:37:57 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] : aaec28d0-ddb8-11f0-547e-ff7bdfb9b5f3 [observed]

 Occultation Date + Time   : 2025-11-04 at 19:37:57 UT +/- 0.06 min  [1]
 Object Designation        : (189753) 2001 YS127
 Star Designation          : GDR3 2790336868053984384
 Star Coordinates (ICRF)   : RA = 01 03 06.2905, DE = +20 34 10.908  [2]
 Star Magnitudes           : G = 8.86 mag, RP = 8.5 mag, BP = 9.07 mag
 Object Magnitude          : V = 19.6 mag
 Estimated Magnitude Drop  : 10.7 mag
 Estimated Max. Duration   : 0.2 sec
 Speed of the shadow       : 9.5 km/s
 Object Mean Diameter      : 2.1 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.5067 arcs/min @ PA = 239 deg
 Horizontal Parallax       : 5.7010 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 13° (sunlit = 99%), Sun = 156°
 Cross-track uncertainty   : 21.3 mas = 23 km = 11.35 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL35
 Note                      : FP:true

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


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