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Stellar Occultation by (1521) Seinajoki on 2025-12-25 (19:33:58 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] : 92e37ce0-d996-11f1-43f3-8e0d7d3bf9a7 [observed]

 Occultation Date + Time   : 2025-12-25 at 19:33:58 UT +/- 0.01 min  [1]
 Object Designation        : (1521) Seinajoki
 Star Designation          : GDR3 0968748603967811200
 Star Coordinates (ICRF)   : RA = 06 17 38.9678, DE = +47 31 15.405  [2]
 Star Magnitudes           : G = 15.83 mag, RP = 15.03 mag, BP = 16.43 mag
 Object Magnitude          : V = 15.57 mag
 Estimated Magnitude Drop  : 0.6 mag
 Estimated Max. Duration   : 1.3 sec
 Speed of the shadow       : 10.3 km/s
 Object Mean Diameter      : 13.7 km  (src: astorb) => apparent = 12 mas
 Apparent Motion           : 0.5467 arcs/min @ PA = 274 deg
 Horizontal Parallax       : 5.6190 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 111° (sunlit = 29%), Sun = 156°
 Cross-track uncertainty   : 1.4 mas = 1 km = 0.12 path-width (1-sig)
 RUWE and duplicate source : 4.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL70
 Note                      : FP:true

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


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