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Stellar Occultation by (6513) 1987 UW1 on 2025-09-20 (21:43:17 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] : 79068730-ddb7-11f0-547e-46d1fcfe8edd [observed]

 Occultation Date + Time   : 2025-09-20 at 21:43:17 UT +/- 0.01 min  [1]
 Object Designation        : (6513) 1987 UW1
 Star Designation          : GDR3 2781307231890195712
 Star Coordinates (ICRF)   : RA = 00 42 55.7326, DE = +15 35 35.956  [2]
 Star Magnitudes           : G = 12.99 mag, RP = 12.41 mag, BP = 13.4 mag
 Object Magnitude          : V = 16.74 mag
 Estimated Magnitude Drop  : 3.8 mag
 Estimated Max. Duration   : 0.8 sec
 Speed of the shadow       : 8.0 km/s
 Object Mean Diameter      : 6.4 km  (src: astorb) => apparent = 7 mas
 Apparent Motion           : 0.4883 arcs/min @ PA = 238 deg
 Horizontal Parallax       : 6.5080 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 150° (sunlit = 1%), Sun = 160°
 Cross-track uncertainty   : 1.7 mas = 1 km = 0.26 path-width (1-sig)
 RUWE and duplicate source : 1.05 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#58
 Note                      : FP:true

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


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