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Stellar Occultation by (325703) 2009 UL57 on 2025-12-14 (21:52:09 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] : daef4440-ddb8-11f0-547e-d2c1d59007f2 [observed]

 Occultation Date + Time   : 2025-12-14 at 21:52:09 UT +/- 0.2 min  [1]
 Object Designation        : (325703) 2009 UL57
 Star Designation          : GDR3 0077132772208655232
 Star Coordinates (ICRF)   : RA = 02 09 15.8038, DE = +13 31 43.495  [2]
 Star Magnitudes           : G = 9.96 mag, RP = 8.99 mag, BP = 10.93 mag
 Object Magnitude          : V = 21.08 mag
 Estimated Magnitude Drop  : 11.1 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 6.3 km/s
 Object Mean Diameter      : 2.4 km  (src: astorb) => apparent = 1 mas
 Apparent Motion           : 0.2083 arcs/min @ PA = 213 deg
 Horizontal Parallax       : 3.4840 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 172° (sunlit = 22%), Sun = 132°
 Cross-track uncertainty   : 17.7 mas = 32 km = 13.50 path-width (1-sig)
 RUWE and duplicate source : 1.79 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#31
 Note                      : FP:true

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


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