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Stellar Occultation by (35891) 1999 JS81 on 2023-09-25 (23:42:59 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] : a9e48531-f984-4268-9aef-73b2642de590 [observed]

 Occultation Date + Time   : 2023-09-25 at 23:42:59 UT +/- 0.18 min  [1]
 Object Designation        : (35891) 1999 JS81
 Star Designation          : GDR3 3288325372406755072
 Star Coordinates (ICRF)   : RA = 04 58 39.2719, DE = +06 59 53.973  [2]
 Star Magnitudes           : G = 16.44 mag, RP = 15.61 mag, BP = 17.14 mag
 Object Magnitude          : V = 18.01 mag
 Estimated Magnitude Drop  : 1.8 mag
 Estimated Max. Duration   : 0.5 sec
 Object Mean Diameter      : 4.5 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 10.1 km/s
 Elongation to Moon & Sun  : 117° (sunlit = 84%), Sun = 108°
 Cross-track uncertainty   : 14.4 mas = 15 km = 3.41 path-width (1-sig)
 RUWE and duplicate source : 1.07 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#46

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


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