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Stellar Occultation by (77704) 2001 OC27 on 2024-09-13 (20:58:17 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] : 5e927140-ddb5-11f0-547e-a18ef7cb559d [observed] Occultation Date + Time : 2024-09-13 at 20:58:17 UT +/- 0.02 min [1] Object Designation : (77704) 2001 OC27 Star Designation : GDR3 4246489862692711296 Star Coordinates (ICRF) : RA = 20 28 23.9290, DE = +05 33 13.526 [2] Star Magnitudes : G = 13.08 mag, RP = 12.54 mag, BP = 13.46 mag Object Magnitude : V = 19.84 mag Estimated Magnitude Drop : 6.8 mag Estimated Max. Duration : 0.5 sec Speed of the shadow : 8.9 km/s Object Mean Diameter : 4.2 km (src: astorb) => apparent = 2 mas Apparent Motion : 0.2967 arcs/min @ PA = 208 deg Horizontal Parallax : 3.5580 arcs Dynamical Class : MBA Elongation to Moon & Sun : 34° (sunlit = 77%), Sun = 134° Cross-track uncertainty : 1.3 mas = 2 km = 0.55 path-width (1-sig) RUWE and duplicate source : 0.97 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#43 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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