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Stellar Occultation by (138940) 2001 BO23 on 2025-08-13 (22:33:28 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] : 3d6fb4d0-ddb7-11f0-547e-a27947abed58 [observed] Occultation Date + Time : 2025-08-13 at 22:33:28 UT +/- 0.06 min [1] Object Designation : (138940) 2001 BO23 Star Designation : GDR3 2590225167683155584 Star Coordinates (ICRF) : RA = 01 21 51.3083, DE = +13 48 08.342 [2] Star Magnitudes : G = 13.64 mag, RP = 12.69 mag, BP = 13.66 mag Object Magnitude : V = 19.95 mag Estimated Magnitude Drop : 6.3 mag Estimated Max. Duration : 0.6 sec Speed of the shadow : 3.7 km/s Object Mean Diameter : 2.1 km (src: astorb) => apparent = 2 mas Apparent Motion : 0.1967 arcs/min @ PA = 37 deg Horizontal Parallax : 5.5870 arcs Dynamical Class : MBA Elongation to Moon & Sun : 3° (sunlit = 75%), Sun = 117° Cross-track uncertainty : 3.0 mas = 3 km = 1.63 path-width (1-sig) RUWE and duplicate source : 1.4 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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