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Stellar Occultation by (23) Thalia on 2025-09-19 (18:39:44 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] : 7475db80-ddb7-11f0-547e-28614bb6ba94 [observed]

 Occultation Date + Time   : 2025-09-19 at 18:39:44 UT +/- 0.01 min  [1]
 Object Designation        : (23) Thalia
 Star Designation          : GDR3 4046297038978026240
 Star Coordinates (ICRF)   : RA = 18 17 19.1871, DE = -31 20 12.225  [2]
 Star Magnitudes           : G = 12.4 mag, RP = 11.86 mag, BP = 12.77 mag
 Object Magnitude          : V = 12.92 mag
 Estimated Magnitude Drop  : 1.0 mag
 Estimated Max. Duration   : 9.7 sec
 Speed of the shadow       : 11.1 km/s
 Object Mean Diameter      : 107.5 km  (src: astorb) => apparent = 51 mas
 Apparent Motion           : 0.3150 arcs/min @ PA = 80 deg
 Horizontal Parallax       : 3.0110 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 120° (sunlit = 4%), Sun = 97°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.73 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#131
 Note                      : FP:true

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


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