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Stellar Occultation by (54) Alexandra on 2023-08-14 (19:07:27 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] : ebbe7f20-ddb3-11f0-547e-4d9675fb70e8 [observed]

 Occultation Date + Time   : 2023-08-14 at 19:07:27 UT +/- 0.01 min  [1]
 Object Designation        : (54) Alexandra
 Star Designation          : GDR3 6768390205298913152
 Star Coordinates (ICRF)   : RA = 19 42 30.1719, DE = -24 04 20.549  [2]
 Star Magnitudes           : G = 12.5 mag, RP = 11.9 mag, BP = 12.76 mag
 Object Magnitude          : V = 10.86 mag
 Estimated Magnitude Drop  : 0.2 mag
 Estimated Max. Duration   : 24.6 sec
 Speed of the shadow       : 6.7 km/s
 Object Mean Diameter      : 165.8 km  (src: astorb) => apparent = 185 mas
 Apparent Motion           : 0.4517 arcs/min @ PA = 307 deg
 Horizontal Parallax       : 7.1230 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 169° (sunlit = 2%), Sun = 151°
 Cross-track uncertainty   : 2.0 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.01 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#210
 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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