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Stellar Occultation by (38312) 1999 RO107 on 2026-09-04 (19:24:51 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] : 70a614c0-d9b0-11f1-43f3-432f6a5e2069 [observed]

 Occultation Date + Time   : 2026-09-04 at 19:24:51 UT +/- 0.03 min  [1]
 Object Designation        : (38312) 1999 RO107
 Star Designation          : GDR3 4123540861958049152
 Star Coordinates (ICRF)   : RA = 17 36 35.2863, DE = -17 45 35.485  [2]
 Star Magnitudes           : G = 14.57 mag, RP = 13.6 mag, BP = 15.55 mag
 Object Magnitude          : V = 19.77 mag
 Estimated Magnitude Drop  : 5.2 mag
 Estimated Max. Duration   : 0.6 sec
 Speed of the shadow       : 9.1 km/s
 Object Mean Diameter      : 5.3 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.2650 arcs/min @ PA = 94 deg
 Horizontal Parallax       : 3.1050 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 168° (sunlit = 45%), Sun = 102°
 Cross-track uncertainty   : 0.7 mas = 1 km = 0.27 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL44
 Note                      : FP:true

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


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