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Stellar Occultation by (206) Hersilia on 2024-09-21 (19:13:10 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] : 6a5834b0-ddb5-11f0-547e-57f6bef38b5d [observed]

 Occultation Date + Time   : 2024-09-21 at 19:13:10 UT +/- 0.01 min  [1]
 Object Designation        : (206) Hersilia
 Star Designation          : GDR3 2440854623264344448
 Star Coordinates (ICRF)   : RA = 23 39 32.9925, DE = -05 28 56.317  [2]
 Star Magnitudes           : G = 13.97 mag, RP = 13.51 mag, BP = 14.26 mag
 Object Magnitude          : V = 12.57 mag
 Estimated Magnitude Drop  : 0.3 mag
 Estimated Max. Duration   : 4.9 sec
 Speed of the shadow       : 11.6 km/s
 Object Mean Diameter      : 56.2 km  (src: astorb) => apparent = 45 mas
 Apparent Motion           : 0.5500 arcs/min @ PA = 242 deg
 Horizontal Parallax       : 5.0530 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 58° (sunlit = 81%), Sun = 173°
 Cross-track uncertainty   : 1.3 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.98 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#139
 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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