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Stellar Occultation by (35891) 1999 JS81 on 2023-09-25 (23:46:34 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] : 19727a70-ddb4-11f0-547e-9faad47f3c33 [observed]

 Occultation Date + Time   : 2023-09-25 at 23:46:34 UT +/- 0.0 min  [1]
 Object Designation        : (35891) 1999 JS81
 Star Designation          : GDR3 3288325372405614208
 Star Coordinates (ICRF)   : RA = 04 58 39.3243, DE = +06 59 50.483  [2]
 Star Magnitudes           : G = 7.89 mag, RP = 6.68 mag, BP = 9.38 mag
 Object Magnitude          : V = 17.98 mag
 Estimated Magnitude Drop  : 10.1 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 10.1 km/s
 Object Mean Diameter      : 4.6 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.5667 arcs/min @ PA = 112 deg
 Horizontal Parallax       : 5.9930 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 117° (sunlit = 84%), Sun = 108°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 1.02 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#55
 Note                      : FP:true

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


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