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Stellar Occultation by (99918) 1998 SQ2 on 2026-08-22 (00:58:03 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] : 420cad60-d9ae-11f1-43f3-8aafffff50cc [observed]

 Occultation Date + Time   : 2026-08-22 at 00:58:03 UT +/- 0.0 min  [1]
 Object Designation        : (99918) 1998 SQ2
 Star Designation          : GDR3 4228400353794569600
 Star Coordinates (ICRF)   : RA = 20 48 29.7176, DE = +00 38 57.613  [2]
 Star Magnitudes           : G = 12.31 mag, RP = 11.82 mag, BP = 12.64 mag
 Object Magnitude          : V = 16.13 mag
 Estimated Magnitude Drop  : 3.9 mag
 Estimated Max. Duration   : 0.6 sec
 Speed of the shadow       : 6.8 km/s
 Object Mean Diameter      : 3.9 km  (src: astorb) => apparent = 7 mas
 Apparent Motion           : 0.7417 arcs/min @ PA = 308 deg
 Horizontal Parallax       : 11.5410 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 59° (sunlit = 68%), Sun = 157°
 Cross-track uncertainty   : 1.3 mas = 0 km = 0.18 path-width (1-sig)
 RUWE and duplicate source : 0.86 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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