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Stellar Occultation by (31817) 1999 RK134 on 2025-09-12 (02:22:06 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] : 6ae23a50-ddb7-11f0-547e-842dfbbe3e8b [observed]

 Occultation Date + Time   : 2025-09-12 at 02:22:06 UT +/- 0.0 min  [1]
 Object Designation        : (31817) 1999 RK134
 Star Designation          : GDR3 3367404928735109632
 Star Coordinates (ICRF)   : RA = 07 10 46.8514, DE = +22 21 39.953  [2]
 Star Magnitudes           : G = 14.37 mag, RP = 13.88 mag, BP = 14.69 mag
 Object Magnitude          : V = 18.41 mag
 Estimated Magnitude Drop  : 4.1 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 29.8 km/s
 Object Mean Diameter      : 13.3 km  (src: astorb) => apparent = 5 mas
 Apparent Motion           : 0.6583 arcs/min @ PA = 101 deg
 Horizontal Parallax       : 2.3500 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 58° (sunlit = 76%), Sun = 63°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.14 path-width (1-sig)
 RUWE and duplicate source : 1.16 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#49
 Note                      : FP:true

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


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