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Stellar Occultation by (186952) 2004 RD57 on 2026-07-13 (21:19:10 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] : adc0ba40-d9ab-11f1-43f3-ca1707fa5a7b [observed]

 Occultation Date + Time   : 2026-07-13 at 21:19:10 UT +/- 0.06 min  [1]
 Object Designation        : (186952) 2004 RD57
 Star Designation          : GDR3 4200928063657421056
 Star Coordinates (ICRF)   : RA = 19 16 30.7590, DE = -09 38 05.985  [2]
 Star Magnitudes           : G = 15.45 mag, RP = 14.68 mag, BP = 16.05 mag
 Object Magnitude          : V = 19.54 mag
 Estimated Magnitude Drop  : 4.1 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 11.5 km/s
 Object Mean Diameter      : 3.0 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.4817 arcs/min @ PA = 261 deg
 Horizontal Parallax       : 4.4390 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 163° (sunlit = 0%), Sun = 167°
 Cross-track uncertainty   : 8.0 mas = 11 km = 3.83 path-width (1-sig)
 RUWE and duplicate source : 1.11 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL34
 Note                      : FP:true

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


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