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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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