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Stellar Occultation by (6421) 1993 XS1 on 2023-08-23 (21:16:14 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] : f75c4830-ddb3-11f0-547e-f4c57d9e40d5 [observed]

 Occultation Date + Time   : 2023-08-23 at 21:16:14 UT +/- 0.0 min  [1]
 Object Designation        : (6421) 1993 XS1
 Star Designation          : GDR3 6867368280689042176
 Star Coordinates (ICRF)   : RA = 19 57 33.7084, DE = -18 51 22.836  [2]
 Star Magnitudes           : G = 11.14 mag, RP = 10.57 mag, BP = 11.53 mag
 Object Magnitude          : V = 17.02 mag
 Estimated Magnitude Drop  : 5.9 mag
 Estimated Max. Duration   : 1.0 sec
 Speed of the shadow       : 7.4 km/s
 Object Mean Diameter      : 7.3 km  (src: astorb) => apparent = 6 mas
 Apparent Motion           : 0.3950 arcs/min @ PA = 239 deg
 Horizontal Parallax       : 5.6720 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 64° (sunlit = 45%), Sun = 147°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.05 path-width (1-sig)
 RUWE and duplicate source : 1.36 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#63
 Note                      : FP:true

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


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