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Stellar Occultation by (49557) 1999 CQ91 on 2025-11-25 (23:25:24 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] : c3d91470-ddb8-11f0-547e-7bcdc7ef9fac [observed]

 Occultation Date + Time   : 2025-11-25 at 23:25:24 UT +/- 0.01 min  [1]
 Object Designation        : (49557) 1999 CQ91
 Star Designation          : GDR3 3292427719007630336
 Star Coordinates (ICRF)   : RA = 04 38 44.5292, DE = +08 05 46.108  [2]
 Star Magnitudes           : G = 11.66 mag, RP = 10.07 mag, BP = 14.57 mag
 Object Magnitude          : V = 18.3 mag
 Estimated Magnitude Drop  : 6.6 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 12.2 km/s
 Object Mean Diameter      : 5.2 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.5117 arcs/min @ PA = 264 deg
 Horizontal Parallax       : 4.4730 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 121° (sunlit = 27%), Sun = 165°
 Cross-track uncertainty   : 1.1 mas = 1 km = 0.30 path-width (1-sig)
 RUWE and duplicate source : 0.92 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#52
 Note                      : FP:true

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


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