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Stellar Occultation by (284471) 2007 HP21 on 2024-12-27 (05:09:25 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] : d0fdabf0-ddb5-11f0-547e-e2fcd7ce0d37 [observed] Occultation Date + Time : 2024-12-27 at 05:09:25 UT +/- 0.14 min [1] Object Designation : (284471) 2007 HP21 Star Designation : GDR3 3811456580944840704 Star Coordinates (ICRF) : RA = 11 06 53.5693, DE = +01 57 17.747 [2] Star Magnitudes : G = 5.25 mag, RP = 4.59 mag, BP = 5.76 mag Object Magnitude : V = 21.77 mag Estimated Magnitude Drop : 16.5 mag Estimated Max. Duration : 0.4 sec Speed of the shadow : 5.3 km/s Object Mean Diameter : 2.0 km (src: astorb) => apparent = 1 mas Apparent Motion : 0.1617 arcs/min @ PA = 120 deg Horizontal Parallax : 3.2300 arcs Dynamical Class : MBA Elongation to Moon & Sun : 65° (sunlit = 14%), Sun = 109° Cross-track uncertainty : 15.0 mas = 29 km = 14.81 path-width (1-sig) RUWE and duplicate source : 0.87 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#32 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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