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Stellar Occultation by (551) Ortrud on 2025-04-07 (04:27:47 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] : 77355f50-85eb-11ef-78cd-6f313bd3936b [asteroids]

 Occultation Date + Time   : 2025-04-07 at 04:27:47 UT +/- 0.01 min  [1]
 Object Designation        : (551) Ortrud
 Star Designation          : GDR3 4080536488209301120
 Star Coordinates (ICRF)   : RA = 19 10 30.8164, DE = -22 52 00.972  [2]
 Star Magnitudes           : G = 11.38 mag, RP = 10.46 mag, BP = 12.25 mag
 Object Magnitude          : V = 15.82 mag
 Estimated Magnitude Drop  : 4.5 mag
 Estimated Max. Duration   : 5.3 sec
 Object Mean Diameter      : 78.5 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 14.7 km/s
 Elongation to Moon & Sun  : 153° (sunlit = 71%), Sun = 91°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.87 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#74

 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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