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Stellar Occultation by (687170) 2011 QF99 on 2025-10-31 (01:13:36 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] : a9a94890-ddb8-11f0-547e-f36dffbb32f7 [observed]

 Occultation Date + Time   : 2025-10-31 at 01:13:36 UT +/- 3.27 min  [1]
 Object Designation        : (687170) 2011 QF99
 Star Designation          : GDR3 3356641053499837824
 Star Coordinates (ICRF)   : RA = 06 27 07.6617, DE = +14 32 36.899  [2]
 Star Magnitudes           : G = 14.05 mag, RP = 13.35 mag, BP = 14.6 mag
 Object Magnitude          : V = 22.25 mag
 Estimated Magnitude Drop  : 8.2 mag
 Estimated Max. Duration   : 4.1 sec
 Speed of the shadow       : 9.4 km/s
 Object Mean Diameter      : 38.3 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.0483 arcs/min @ PA = 243 deg
 Horizontal Parallax       : 0.5400 arcs
 Dynamical Class           : 
 Elongation to Moon & Sun  : 131° (sunlit = 64%), Sun = 121°
 Cross-track uncertainty   : 73.0 mas = 862 km = 22.51 path-width (1-sig)
 RUWE and duplicate source : 1.05 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#13
 Note                      : FP:true

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


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