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Stellar Occultation by (418) Alemannia on 2023-04-04 (21:16:37 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] : 8aa5c6d0-ddb3-11f0-547e-c946cefb6c71 [observed]

 Occultation Date + Time   : 2023-04-04 at 21:16:37 UT +/- 0.0 min  [1]
 Object Designation        : (418) Alemannia
 Star Designation          : GDR3 3370711499501052544
 Star Coordinates (ICRF)   : RA = 06 21 21.6329, DE = +18 10 04.937  [2]
 Star Magnitudes           : G = 13.97 mag, RP = 13.4 mag, BP = 14.23 mag
 Object Magnitude          : V = 14.98 mag
 Estimated Magnitude Drop  : 1.4 mag
 Estimated Max. Duration   : 1.6 sec
 Speed of the shadow       : 21.9 km/s
 Object Mean Diameter      : 34.1 km  (src: astorb) => apparent = 18 mas
 Apparent Motion           : 0.6983 arcs/min @ PA = 91 deg
 Horizontal Parallax       : 3.3880 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 85° (sunlit = 98%), Sun = 80°
 Cross-track uncertainty   : 0.9 mas = 1 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 6.78 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#112
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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