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Stellar Occultation by (389797) 2011 UB134 on 2025-04-23 (20:55:33 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] : 7f9ae790-ddb6-11f0-547e-01e5ffffa1d0 [observed]

 Occultation Date + Time   : 2025-04-23 at 20:55:33 UT +/- 0.15 min  [1]
 Object Designation        : (389797) 2011 UB134
 Star Designation          : GDR3 4337875810291561344
 Star Coordinates (ICRF)   : RA = 16 45 35.4671, DE = -09 27 27.153  [2]
 Star Magnitudes           : G = 11.13 mag, RP = 9.84 mag, BP = 12.94 mag
 Object Magnitude          : V = 20.28 mag
 Estimated Magnitude Drop  : 9.2 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 3.8 km/s
 Object Mean Diameter      : 1.80 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.1900 arcs/min @ PA = 274 deg
 Horizontal Parallax       : 5.3470 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 88° (sunlit = 21%), Sun = 141°
 Cross-track uncertainty   : 23.7 mas = 28 km = 15.71 path-width (1-sig)
 RUWE and duplicate source : 1.2 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#27
 Note                      : FP:true

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


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