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Stellar Occultation by (31227) 1998 BC41 on 2026-08-17 (04:35:10 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] : ff7540c0-d9ad-11f1-43f3-e85470ffe357 [observed]

 Occultation Date + Time   : 2026-08-17 at 04:35:10 UT +/- 0.0 min  [1]
 Object Designation        : (31227) 1998 BC41
 Star Designation          : GDR3 0181423507392371712
 Star Coordinates (ICRF)   : RA = 05 13 19.8775, DE = +32 29 34.608  [2]
 Star Magnitudes           : G = 14.16 mag, RP = 13.6 mag, BP = 14.54 mag
 Object Magnitude          : V = 18.13 mag
 Estimated Magnitude Drop  : 4.0 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 27.5 km/s
 Object Mean Diameter      : 11.7 km  (src: astorb) => apparent = 5 mas
 Apparent Motion           : 0.7100 arcs/min @ PA = 82 deg
 Horizontal Parallax       : 2.7470 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 121° (sunlit = 23%), Sun = 65°
 Cross-track uncertainty   : 0.2 mas = 0 km = 0.04 path-width (1-sig)
 RUWE and duplicate source : 0.96 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL69
 Note                      : FP:true

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


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