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Stellar Occultation by (129808) 1999 KF18 on 2025-09-07 (21:45:37 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] : 708fa0a0-ddb7-11f0-547e-3340fe172319 [observed]

 Occultation Date + Time   : 2025-09-07 at 21:45:37 UT +/- 0.3 min  [1]
 Object Designation        : (129808) 1999 KF18
 Star Designation          : GDR3 6906719694470121472
 Star Coordinates (ICRF)   : RA = 20 37 40.9385, DE = -07 58 25.932  [2]
 Star Magnitudes           : G = 12.34 mag, RP = 11.65 mag, BP = 12.87 mag
 Object Magnitude          : V = 18.43 mag
 Estimated Magnitude Drop  : 6.1 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 6.6 km/s
 Object Mean Diameter      : 2.1 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.5533 arcs/min @ PA = 172 deg
 Horizontal Parallax       : 8.9120 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 39° (sunlit = 100%), Sun = 143°
 Cross-track uncertainty   : 17.7 mas = 12 km = 6.03 path-width (1-sig)
 RUWE and duplicate source : 1.21 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#40
 Note                      : FP:true

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


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