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Stellar Occultation by (11440) Massironi on 2025-09-23 (21:41:59 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] : b44c8500-ddb8-11f0-547e-d4268fba82a9 [observed]

 Occultation Date + Time   : 2025-09-23 at 21:41:59 UT +/- 0.0 min  [1]
 Object Designation        : (11440) Massironi
 Star Designation          : GDR3 2643535160755905920
 Star Coordinates (ICRF)   : RA = 23 50 04.1482, DE = +01 52 16.087  [2]
 Star Magnitudes           : G = 13.31 mag, RP = 12.88 mag, BP = 13.58 mag
 Object Magnitude          : V = 17.45 mag
 Estimated Magnitude Drop  : 4.2 mag
 Estimated Max. Duration   : 0.7 sec
 Speed of the shadow       : 13.9 km/s
 Object Mean Diameter      : 9.5 km  (src: astorb) => apparent = 6 mas
 Apparent Motion           : 0.4850 arcs/min @ PA = 235 deg
 Horizontal Parallax       : 3.7200 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 154° (sunlit = 4%), Sun = 176°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#70
 Note                      : FP:true

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


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