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Stellar Occultation by (74546) 1999 JR61 on 2025-09-04 (21:41:10 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] : 622c7600-ddb7-11f0-547e-dd54bfffe421 [observed]

 Occultation Date + Time   : 2025-09-04 at 21:41:10 UT +/- 0.01 min  [1]
 Object Designation        : (74546) 1999 JR61
 Star Designation          : GDR3 4098636167645571712
 Star Coordinates (ICRF)   : RA = 18 40 46.0350, DE = -18 14 42.503  [2]
 Star Magnitudes           : G = 13.65 mag, RP = 12.63 mag, BP = 14.72 mag
 Object Magnitude          : V = 19.19 mag
 Estimated Magnitude Drop  : 5.6 mag
 Estimated Max. Duration   : 0.3 sec
 Speed of the shadow       : 7.7 km/s
 Object Mean Diameter      : 1.90 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.5417 arcs/min @ PA = 94 deg
 Horizontal Parallax       : 7.5040 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 28° (sunlit = 90%), Sun = 117°
 Cross-track uncertainty   : 2.0 mas = 1 km = 0.89 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#41
 Note                      : FP:true

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


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