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Stellar Occultation by (63891) 2001 SN4 on 2025-11-07 (17:41:38 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] : ae32c850-ddb8-11f0-547e-d30972ff4bb1 [observed]

 Occultation Date + Time   : 2025-11-07 at 17:41:38 UT +/- 0.02 min  [1]
 Object Designation        : (63891) 2001 SN4
 Star Designation          : GDR3 0969698135337145472
 Star Coordinates (ICRF)   : RA = 06 04 49.3291, DE = +47 51 17.335  [2]
 Star Magnitudes           : G = 14.78 mag, RP = 14.22 mag, BP = 15.17 mag
 Object Magnitude          : V = 19.1 mag
 Estimated Magnitude Drop  : 4.3 mag
 Estimated Max. Duration   : 0.7 sec
 Speed of the shadow       : 6.5 km/s
 Object Mean Diameter      : 4.8 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.2517 arcs/min @ PA = 329 deg
 Horizontal Parallax       : 4.0950 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 24° (sunlit = 93%), Sun = 130°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.23 path-width (1-sig)
 RUWE and duplicate source : 0.99 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL50
 Note                      : FP:true

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


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