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Stellar Occultation by (148114) 1999 SM12 on 2026-09-11 (22:20:47 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] : 06e74f90-d9b0-11f1-43f3-cd9abcffa6e5 [observed]

 Occultation Date + Time   : 2026-09-11 at 22:20:47 UT +/- 0.27 min  [1]
 Object Designation        : (148114) 1999 SM12
 Star Designation          : GDR3 6887604414239202944
 Star Coordinates (ICRF)   : RA = 20 45 18.0350, DE = -13 44 11.417  [2]
 Star Magnitudes           : G = 15.18 mag, RP = 14.59 mag, BP = 15.6 mag
 Object Magnitude          : V = 18.55 mag
 Estimated Magnitude Drop  : 3.4 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 8.6 km/s
 Object Mean Diameter      : 3.8 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.4433 arcs/min @ PA = 195 deg
 Horizontal Parallax       : 5.5090 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 131° (sunlit = 1%), Sun = 141°
 Cross-track uncertainty   : 1.7 mas = 1 km = 0.52 path-width (1-sig)
 RUWE and duplicate source : 0.97 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL40
 Note                      : FP:true

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


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