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Stellar Occultation by (263971) 2009 KB1 on 2026-07-31 (21:26:07 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] : 385a4b80-d9ac-11f1-43f3-4de2faf7e708 [observed]

 Occultation Date + Time   : 2026-07-31 at 21:26:07 UT +/- 0.18 min  [1]
 Object Designation        : (263971) 2009 KB1
 Star Designation          : GDR3 2725647410671537152
 Star Coordinates (ICRF)   : RA = 21 58 21.2130, DE = +09 51 48.339  [2]
 Star Magnitudes           : G = 13.13 mag, RP = 12.6 mag, BP = 13.5 mag
 Object Magnitude          : V = 19.77 mag
 Estimated Magnitude Drop  : 6.6 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 7.2 km/s
 Object Mean Diameter      : 2.1 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.3767 arcs/min @ PA = 248 deg
 Horizontal Parallax       : 5.5840 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 20° (sunlit = 95%), Sun = 147°
 Cross-track uncertainty   : 30.0 mas = 34 km = 16.32 path-width (1-sig)
 RUWE and duplicate source : 0.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL29
 Note                      : FP:true

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


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