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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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