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Stellar Occultation by (106) Dione on 2025-10-31 (19:17:16 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] : a724e7a0-ddb8-11f0-547e-a4e4fded27a9 [observed]

 Occultation Date + Time   : 2025-10-31 at 19:17:16 UT +/- 0.0 min  [1]
 Object Designation        : (106) Dione
 Star Designation          : GDR3 4052042365194710912
 Star Coordinates (ICRF)   : RA = 18 29 17.5930, DE = -26 22 44.122  [2]
 Star Magnitudes           : G = 13.11 mag, RP = 11.99 mag, BP = 14.43 mag
 Object Magnitude          : V = 13.92 mag
 Estimated Magnitude Drop  : 1.2 mag
 Estimated Max. Duration   : 4.7 sec
 Speed of the shadow       : 31.2 km/s
 Object Mean Diameter      : 146.6 km  (src: astorb) => apparent = 56 mas
 Apparent Motion           : 0.7150 arcs/min @ PA = 87 deg
 Horizontal Parallax       : 2.4340 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 58° (sunlit = 72%), Sun = 58°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.95 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#156
 Note                      : FP:true

 Object is a <Gaia mass determination> target !

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


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