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Stellar Occultation by (1200) Imperatrix on 2023-12-16 (01:17:49 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] : 46eec3f0-ddb4-11f0-547e-e59dffffa7c0 [observed]

 Occultation Date + Time   : 2023-12-16 at 01:17:49 UT +/- 0.0 min  [1]
 Object Designation        : (1200) Imperatrix
 Star Designation          : GDR3 3313328885297274752
 Star Coordinates (ICRF)   : RA = 04 31 52.3304, DE = +17 01 16.982  [2]
 Star Magnitudes           : G = 13.64 mag, RP = 12.99 mag, BP = 14.11 mag
 Object Magnitude          : V = 15.9 mag
 Estimated Magnitude Drop  : 2.4 mag
 Estimated Max. Duration   : 2.8 sec
 Speed of the shadow       : 14.1 km/s
 Object Mean Diameter      : 39.5 km  (src: astorb) => apparent = 22 mas
 Apparent Motion           : 0.4767 arcs/min @ PA = 260 deg
 Horizontal Parallax       : 3.6010 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 124° (sunlit = 12%), Sun = 164°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.97 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#81
 Note                      : FP:true

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


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