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Stellar Occultation by (464) Megaira on 2025-10-12 (18:59:45 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] : 8cc77c10-ddb8-11f0-547e-ff6456ef4cbe [observed]

 Occultation Date + Time   : 2025-10-12 at 18:59:45 UT +/- 0.0 min  [1]
 Object Designation        : (464) Megaira
 Star Designation          : GDR3 4110652592814673280
 Star Coordinates (ICRF)   : RA = 17 31 58.8724, DE = -23 34 30.247  [2]
 Star Magnitudes           : G = 14.69 mag, RP = 13.28 mag, BP = 17.25 mag
 Object Magnitude          : V = 15.03 mag
 Estimated Magnitude Drop  : 0.9 mag
 Estimated Max. Duration   : 2.5 sec
 Speed of the shadow       : 29.9 km/s
 Object Mean Diameter      : 74.0 km  (src: astorb) => apparent = 36 mas
 Apparent Motion           : 0.8733 arcs/min @ PA = 99 deg
 Horizontal Parallax       : 3.1040 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 166° (sunlit = 61%), Sun = 64°
 Cross-track uncertainty   : 0.8 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 0.97 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#120
 Note                      : FP:true

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


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