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Stellar Occultation by (554167) 2012 QS25 on 2025-10-15 (01:45:55 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] : 913d73d0-ddb8-11f0-547e-c6a5f56ea881 [observed]

 Occultation Date + Time   : 2025-10-15 at 01:45:55 UT +/- 0.12 min  [1]
 Object Designation        : (554167) 2012 QS25
 Star Designation          : GDR3 2512698465369770496
 Star Coordinates (ICRF)   : RA = 01 54 54.6290, DE = +03 47 05.124  [2]
 Star Magnitudes           : G = 9.7 mag, RP = 9.25 mag, BP = 9.98 mag
 Object Magnitude          : V = 21.04 mag
 Estimated Magnitude Drop  : 11.3 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 17.3 km/s
 Object Mean Diameter      : 5.2 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.3400 arcs/min @ PA = 238 deg
 Horizontal Parallax       : 2.0800 arcs
 Dynamical Class           : JTRO
 Elongation to Moon & Sun  : 101° (sunlit = 36%), Sun = 170°
 Cross-track uncertainty   : 21.0 mas = 64 km = 12.38 path-width (1-sig)
 RUWE and duplicate source : 2.09 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL19
 Note                      : FP:true

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


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