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Stellar Occultation by (447178) 2005 RO43 on 2025-12-31 (02:52:18 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] : 380bbad0-408b-11f0-4ed7-b50562f7033b [cetnos] Occultation Date + Time : 2025-12-31 at 02:52:18 UT +/- 1.17 min [1] Object Designation : (447178) 2005 RO43 Star Designation : GDR3 5718298743276254464 Star Coordinates (ICRF) : RA = 07 55 42.8544, DE = -16 30 41.735 [2] Star Magnitudes : G = 15.25 mag, RP = 14.75 mag, BP = 15.57 mag Object Magnitude : V = 19.15 mag Estimated Magnitude Drop : 3.9 mag Estimated Max. Duration : 6.6 sec Speed of the shadow : 19.5 km/s Object Mean Diameter : 129.3 km (src: CORA+astorb) => apparent = 12 mas Apparent Motion : 0.1100 arcs/min @ PA = 265 deg Horizontal Parallax : 0.6010 arcs Dynamical Class : CEN Elongation to Moon & Sun : 78° (sunlit = 85%), Sun = 137° Cross-track uncertainty : 45.0 mas = 477 km = 3.69 path-width (1-sig) RUWE and duplicate source : 0.91 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#24 Object is a <TNOs are Cool> target ! [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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