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Stellar Occultation by (121229) 1999 RC30 on 2025-09-12 (21:24:49 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] : 6cc04920-ddb7-11f0-547e-8701fffa8bc6 [observed]

 Occultation Date + Time   : 2025-09-12 at 21:24:49 UT +/- 0.01 min  [1]
 Object Designation        : (121229) 1999 RC30
 Star Designation          : GDR3 2840056508985366528
 Star Coordinates (ICRF)   : RA = 23 26 50.7315, DE = +24 10 48.017  [2]
 Star Magnitudes           : G = 11.42 mag, RP = 10.9 mag, BP = 11.77 mag
 Object Magnitude          : V = 18.81 mag
 Estimated Magnitude Drop  : 7.4 mag
 Estimated Max. Duration   : 0.2 sec
 Speed of the shadow       : 14.8 km/s
 Object Mean Diameter      : 3.5 km  (src: astorb) => apparent = 3 mas
 Apparent Motion           : 0.7400 arcs/min @ PA = 279 deg
 Horizontal Parallax       : 5.3130 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 58° (sunlit = 68%), Sun = 152°
 Cross-track uncertainty   : 3.7 mas = 4 km = 1.27 path-width (1-sig)
 RUWE and duplicate source : 0.96 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL37
 Note                      : FP:true

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


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