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Stellar Occultation by (228139) 2009 RS33 on 2025-08-12 (20:25:10 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] : 38a9a140-ddb7-11f0-547e-65457d66e628 [observed]

 Occultation Date + Time   : 2025-08-12 at 20:25:10 UT +/- 0.14 min  [1]
 Object Designation        : (228139) 2009 RS33
 Star Designation          : GDR3 4212543819894675072
 Star Coordinates (ICRF)   : RA = 19 12 22.0953, DE = -03 50 20.562  [2]
 Star Magnitudes           : G = 12.16 mag, RP = 10.59 mag, BP = 15.77 mag
 Object Magnitude          : V = 19.82 mag
 Estimated Magnitude Drop  : 7.7 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 7.3 km/s
 Object Mean Diameter      : 1.90 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.4017 arcs/min @ PA = 227 deg
 Horizontal Parallax       : 5.8340 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 77° (sunlit = 85%), Sun = 144°
 Cross-track uncertainty   : 26.7 mas = 29 km = 15.36 path-width (1-sig)
 RUWE and duplicate source : 1.29 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL28
 Note                      : FP:true

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


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