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Stellar Occultation by (99148) 2001 FO121 on 2025-08-25 (00:22:09 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] : 5115eb30-ddb7-11f0-547e-97f4df5f0a06 [observed] Occultation Date + Time : 2025-08-25 at 00:22:09 UT +/- 0.04 min [1] Object Designation : (99148) 2001 FO121 Star Designation : GDR3 2520616495278044928 Star Coordinates (ICRF) : RA = 02 17 31.6374, DE = +06 49 07.296 [2] Star Magnitudes : G = 13.74 mag, RP = 13.08 mag, BP = 14.25 mag Object Magnitude : V = 19.52 mag Estimated Magnitude Drop : 5.8 mag Estimated Max. Duration : 1.0 sec Speed of the shadow : 3.6 km/s Object Mean Diameter : 3.6 km (src: astorb) => apparent = 2 mas Apparent Motion : 0.1483 arcs/min @ PA = 32 deg Horizontal Parallax : 4.3310 arcs Dynamical Class : MBA Elongation to Moon & Sun : 138° (sunlit = 3%), Sun = 117° Cross-track uncertainty : 2.3 mas = 3 km = 0.94 path-width (1-sig) RUWE and duplicate source : 1.07 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#48 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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