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Stellar Occultation by (12721) 1991 PB on 2023-09-04 (19:28:41 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] : fdf98cc0-ddb3-11f0-547e-5dfc7dd9ec70 [observed] Occultation Date + Time : 2023-09-04 at 19:28:41 UT +/- 0.0 min [1] Object Designation : (12721) 1991 PB Star Designation : GDR3 4115093520223240320 Star Coordinates (ICRF) : RA = 17 21 57.2011, DE = -21 06 33.606 [2] Star Magnitudes : G = 13.49 mag, RP = 12.42 mag, BP = 14.68 mag Object Magnitude : V = 17.3 mag Estimated Magnitude Drop : 3.9 mag Estimated Max. Duration : 0.4 sec Speed of the shadow : 14.1 km/s Object Mean Diameter : 5.7 km (src: astorb) => apparent = 6 mas Apparent Motion : 0.8400 arcs/min @ PA = 100 deg Horizontal Parallax : 6.3280 arcs Dynamical Class : MBA Elongation to Moon & Sun : 145° (sunlit = 72%), Sun = 99° Cross-track uncertainty : 0.3 mas = 0 km = 0.05 path-width (1-sig) RUWE and duplicate source : 1.01 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#56 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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