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Stellar Occultation by (584) Semiramis on 2018-09-21 (21:58:59 UT)



Event Details
 Occultation UUID [and db] : 92f80d06-5509-409a-93c8-c2f95e89b94a [observed]

 Occultation Date + Time   : 2018-09-21 at 21:58:59 UT +/- 0.02 min  [1]
 Object Designation        : (584) Semiramis
 Star Designation          : GDR3 0219252862080040320
 Star Coordinates (ICRF)   : RA = 04 03 40.8003, DE = +35 57 03.679  [2]
 Star Magnitudes           : G = 11.31 mag, RP = 10.73 mag, BP = 11.73 mag
 Object Magnitude          : V = 11.5 mag
 Estimated Magnitude Drop  : 0.9 mag
 Estimated Max. Duration   : 6.9 sec
 Object Mean Diameter      : 54 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 7.8 km/s
 Elongation to Moon & Sun  : 103° (sunlit = 91%), Sun = 112°
 Cross-track uncertainty   : 1.7 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.25 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#111

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


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