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Stellar Occultation by (259) Aletheia on 2023-04-01 (18:49:15 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] : 7fc77d30-ddb3-11f0-547e-b808e79f1a17 [observed]

 Occultation Date + Time   : 2023-04-01 at 18:49:15 UT +/- 0.0 min  [1]
 Object Designation        : (259) Aletheia
 Star Designation          : GDR3 3440959194320752896
 Star Coordinates (ICRF)   : RA = 05 41 50.9136, DE = +26 08 38.764  [2]
 Star Magnitudes           : G = 13.08 mag, RP = 12.14 mag, BP = 13.98 mag
 Object Magnitude          : V = 14.16 mag
 Estimated Magnitude Drop  : 1.4 mag
 Estimated Max. Duration   : 8.3 sec
 Speed of the shadow       : 21.4 km/s
 Object Mean Diameter      : 178.6 km  (src: astorb) => apparent = 68 mas
 Apparent Motion           : 0.4917 arcs/min @ PA = 84 deg
 Horizontal Parallax       : 2.4400 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 56° (sunlit = 82%), Sun = 74°
 Cross-track uncertainty   : 1.0 mas = 2 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.04 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#149
 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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