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Stellar Occultation by (20729) 1999 XS143 on 2025-01-19 (02:06:46 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] : 301bb8f0-8b5c-11ef-78cd-bf71f7fba92b [asteroids]

 Occultation Date + Time   : 2025-01-19 at 02:06:46 UT +/- 0.03 min  [1]
 Object Designation        : (20729) 1999 XS143
 Star Designation          : GDR3 3848844266960984576
 Star Coordinates (ICRF)   : RA = 09 53 57.9147, DE = +04 17 14.471  [2]
 Star Magnitudes           : G = 12.67 mag, RP = 12.2 mag, BP = 12.98 mag
 Object Magnitude          : V = 17.76 mag
 Estimated Magnitude Drop  : 5.1 mag
 Estimated Max. Duration   : 1.8 sec
 Object Mean Diameter      : 28 km  (src: astorb)
 Orbital Class             : JTRO
 Speed of the shadow       : 15.6 km/s
 Elongation to Moon & Sun  : 31° (sunlit = 75%), Sun = 149°
 Cross-track uncertainty   : 7.7 mas = 24 km = 0.90 path-width (1-sig)
 RUWE and duplicate source : 1.16 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#59

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


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