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Stellar Occultation by (316549) 2010 XD78 on 2025-09-21 (22:02:12 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] : a0a711f0-ddb8-11f0-547e-2dd77fff73cb [observed]

 Occultation Date + Time   : 2025-09-21 at 22:02:12 UT +/- 0.19 min  [1]
 Object Designation        : (316549) 2010 XD78
 Star Designation          : GDR3 4186290643300977664
 Star Coordinates (ICRF)   : RA = 19 33 27.5589, DE = -13 19 24.866  [2]
 Star Magnitudes           : G = 12.22 mag, RP = 11.39 mag, BP = 12.96 mag
 Object Magnitude          : V = 21.26 mag
 Estimated Magnitude Drop  : 9.0 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 6.2 km/s
 Object Mean Diameter      : 2.6 km  (src: astorb) => apparent = 1 mas
 Apparent Motion           : 0.1850 arcs/min @ PA = 137 deg
 Horizontal Parallax       : 3.2040 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 113° (sunlit = 0%), Sun = 114°
 Cross-track uncertainty   : 18.0 mas = 35 km = 13.78 path-width (1-sig)
 RUWE and duplicate source : 1.18 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#35
 Note                      : FP:true

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


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