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Stellar Occultation by (1398) Donnera on 2025-08-21 (19:28:38 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] : 4cd6bae0-ddb7-11f0-547e-e898979f2eb3 [observed] Occultation Date + Time : 2025-08-21 at 19:28:38 UT +/- 0.05 min [1] Object Designation : (1398) Donnera Star Designation : GDR3 4053208294198061184 Star Coordinates (ICRF) : RA = 18 22 40.2327, DE = -25 04 44.346 [2] Star Magnitudes : G = 14.07 mag, RP = 13.44 mag, BP = 14.53 mag Object Magnitude : V = 15.38 mag Estimated Magnitude Drop : 1.6 mag Estimated Max. Duration : 8.0 sec Speed of the shadow : 4.3 km/s Object Mean Diameter : 34.5 km (src: astorb) => apparent = 20 mas Apparent Motion : 0.1517 arcs/min @ PA = 338 deg Horizontal Parallax : 3.7190 arcs Dynamical Class : MBA Elongation to Moon & Sun : 144° (sunlit = 2%), Sun = 126° Cross-track uncertainty : 0.7 mas = 1 km = 0.03 path-width (1-sig) RUWE and duplicate source : 0.85 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#72 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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