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Stellar Occultation by (128778) 2004 RP200 on 2025-09-20 (19:52:13 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] : 770d0120-ddb7-11f0-547e-ecc0ecb39ec9 [observed] Occultation Date + Time : 2025-09-20 at 19:52:13 UT +/- 0.01 min [1] Object Designation : (128778) 2004 RP200 Star Designation : GDR3 4253850989959853440 Star Coordinates (ICRF) : RA = 18 59 54.4704, DE = -05 53 14.272 [2] Star Magnitudes : G = 12.54 mag, RP = 11.73 mag, BP = 13.23 mag Object Magnitude : V = 19.06 mag Estimated Magnitude Drop : 6.5 mag Estimated Max. Duration : 0.5 sec Speed of the shadow : 8.0 km/s Object Mean Diameter : 4.0 km (src: astorb) => apparent = 3 mas Apparent Motion : 0.3533 arcs/min @ PA = 101 deg Horizontal Parallax : 4.6670 arcs Dynamical Class : MBA Elongation to Moon & Sun : 118° (sunlit = 1%), Sun = 107° Cross-track uncertainty : 1.7 mas = 2 km = 0.58 path-width (1-sig) RUWE and duplicate source : 0.92 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#39 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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