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Stellar Occultation by (884157) 2017 BG221 on 2026-09-28 (00:20:29 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] : facb43e0-d9b1-11f1-43f3-87f5ebde8b8e [observed]

 Occultation Date + Time   : 2026-09-28 at 00:20:29 UT +/- 0.76 min  [1]
 Object Designation        : (884157) 2017 BG221
 Star Designation          : GDR3 3417930850988262528
 Star Coordinates (ICRF)   : RA = 05 29 47.5030, DE = +26 17 17.565  [2]
 Star Magnitudes           : G = 12.14 mag, RP = 10.89 mag, BP = 13.91 mag
 Object Magnitude          : V = 22.37 mag
 Estimated Magnitude Drop  : 10.2 mag
 Estimated Max. Duration   : 0.6 sec
 Speed of the shadow       : 6.6 km/s
 Object Mean Diameter      : 3.8 km  (src: astorb) => apparent = 1 mas
 Apparent Motion           : 0.1150 arcs/min @ PA = 98 deg
 Horizontal Parallax       : 1.8650 arcs
 Dynamical Class           : 
 Elongation to Moon & Sun  : 61° (sunlit = 98%), Sun = 102°
 Cross-track uncertainty   : 42.3 mas = 144 km = 38.07 path-width (1-sig)
 RUWE and duplicate source : 1.11 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL8
 Note                      : FP:true

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


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