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Stellar Occultation by (20716) 1999 XG91 on 2026-09-08 (18:40:28 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] : 2ef9cb70-d9b0-11f1-43f3-f7b3ded5eee1 [observed]

 Occultation Date + Time   : 2026-09-08 at 18:40:28 UT +/- 0.02 min  [1]
 Object Designation        : (20716) 1999 XG91
 Star Designation          : GDR3 3949251157709785216
 Star Coordinates (ICRF)   : RA = 12 37 03.6644, DE = +20 28 31.058  [2]
 Star Magnitudes           : G = 13.29 mag, RP = 12.65 mag, BP = 13.77 mag
 Object Magnitude          : V = 19.85 mag
 Estimated Magnitude Drop  : 6.6 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 40.2 km/s
 Object Mean Diameter      : 17.4 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.4917 arcs/min @ PA = 117 deg
 Horizontal Parallax       : 1.3020 arcs
 Dynamical Class           : JTRO
 Elongation to Moon & Sun  : 48° (sunlit = 7%), Sun = 26°
 Cross-track uncertainty   : 2.3 mas = 11 km = 0.65 path-width (1-sig)
 RUWE and duplicate source : 0.96 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL52
 Note                      : FP:true

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


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