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Stellar Occultation by (181904) 1999 RN254 on 2025-11-10 (19:58:25 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] : b2a00d80-ddb8-11f0-547e-2f7bef7e35a1 [observed]

 Occultation Date + Time   : 2025-11-10 at 19:58:25 UT +/- 0.14 min  [1]
 Object Designation        : (181904) 1999 RN254
 Star Designation          : GDR3 2449146280968113152
 Star Coordinates (ICRF)   : RA = 23 51 09.8817, DE = -02 31 14.627  [2]
 Star Magnitudes           : G = 7.32 mag, RP = 6.44 mag, BP = 8.13 mag
 Object Magnitude          : V = 19.39 mag
 Estimated Magnitude Drop  : 12.1 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 3.9 km/s
 Object Mean Diameter      : 1.60 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.2850 arcs/min @ PA = 36 deg
 Horizontal Parallax       : 7.8340 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 124° (sunlit = 65%), Sun = 128°
 Cross-track uncertainty   : 18.3 mas = 14 km = 9.31 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#32
 Note                      : FP:true

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


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