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Stellar Occultation by (335) Roberta on 2024-07-21 (21:14:34 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] : 1464ba10-ddb5-11f0-547e-f6abedff136d [observed]

 Occultation Date + Time   : 2024-07-21 at 21:14:34 UT +/- 0.02 min  [1]
 Object Designation        : (335) Roberta
 Star Designation          : GDR3 6888490861127367040
 Star Coordinates (ICRF)   : RA = 21 00 17.8866, DE = -13 11 51.170  [2]
 Star Magnitudes           : G = 11.28 mag, RP = 10.07 mag, BP = 10.88 mag
 Object Magnitude          : V = 11.36 mag
 Estimated Magnitude Drop  : 0.8 mag
 Estimated Max. Duration   : 13.5 sec
 Speed of the shadow       : 6.6 km/s
 Object Mean Diameter      : 89.1 km  (src: astorb) => apparent = 115 mas
 Apparent Motion           : 0.5133 arcs/min @ PA = 240 deg
 Horizontal Parallax       : 8.2430 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 11° (sunlit = 100%), Sun = 165°
 Cross-track uncertainty   : 1.6 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 4.2 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#95
 Note                      : FP:true

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


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