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Stellar Occultation by (257395) 2009 SW216 on 2023-12-24 (17:31:34 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] : 50ef57c0-ddb4-11f0-547e-c4d2bfff7dd9 [observed]

 Occultation Date + Time   : 2023-12-24 at 17:31:34 UT +/- 0.06 min  [1]
 Object Designation        : (257395) 2009 SW216
 Star Designation          : GDR3 0196476891026257664
 Star Coordinates (ICRF)   : RA = 05 49 39.8014, DE = +43 42 17.706  [2]
 Star Magnitudes           : G = 7.98 mag, RP = 7.1 mag, BP = 8.79 mag
 Object Magnitude          : V = 19.39 mag
 Estimated Magnitude Drop  : 11.4 mag
 Estimated Max. Duration   : 0.6 sec
 Speed of the shadow       : 15.3 km/s
 Object Mean Diameter      : 8.8 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.3533 arcs/min @ PA = 270 deg
 Horizontal Parallax       : 2.4600 arcs
 Dynamical Class           : JTRO
 Elongation to Moon & Sun  : 28° (sunlit = 94%), Sun = 159°
 Cross-track uncertainty   : 20.7 mas = 53 km = 6.10 path-width (1-sig)
 RUWE and duplicate source : 0.94 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#35
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0


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