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Stellar Occultation by (31819) 1999 RS150 on 2025-10-18 (21:59:48 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] : 942132d0-ddb8-11f0-547e-dd12f9b61966 [observed]

 Occultation Date + Time   : 2025-10-18 at 21:59:48 UT +/- 0.05 min  [1]
 Object Designation        : (31819) 1999 RS150
 Star Designation          : GDR3 0220044166853883392
 Star Coordinates (ICRF)   : RA = 03 49 01.9128, DE = +36 07 02.928  [2]
 Star Magnitudes           : G = 10.72 mag, RP = 9.95 mag, BP = 11.36 mag
 Object Magnitude          : V = 18.87 mag
 Estimated Magnitude Drop  : 8.1 mag
 Estimated Max. Duration   : 1.4 sec
 Speed of the shadow       : 12.5 km/s
 Object Mean Diameter      : 17.5 km  (src: astorb) => apparent = 5 mas
 Apparent Motion           : 0.2300 arcs/min @ PA = 284 deg
 Horizontal Parallax       : 1.9580 arcs
 Dynamical Class           : JTRO
 Elongation to Moon & Sun  : 113° (sunlit = 6%), Sun = 140°
 Cross-track uncertainty   : 3.3 mas = 10 km = 0.61 path-width (1-sig)
 RUWE and duplicate source : 1.17 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL53
 Note                      : FP:true

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


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