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Stellar Occultation by (39530) 1990 EX1 on 2023-12-22 (20:16:27 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] : 4a6ec2f0-ddb4-11f0-547e-476f8bde6cfa [observed]

 Occultation Date + Time   : 2023-12-22 at 20:16:27 UT +/- 0.01 min  [1]
 Object Designation        : (39530) 1990 EX1
 Star Designation          : GDR3 3132560888696552320
 Star Coordinates (ICRF)   : RA = 06 41 31.0038, DE = +05 45 58.669  [2]
 Star Magnitudes           : G = 11.65 mag, RP = 11.25 mag, BP = 11.89 mag
 Object Magnitude          : V = 18.14 mag
 Estimated Magnitude Drop  : 6.5 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 11.6 km/s
 Object Mean Diameter      : 5.6 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.4983 arcs/min @ PA = 262 deg
 Horizontal Parallax       : 4.5660 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 63° (sunlit = 82%), Sun = 160°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.25 path-width (1-sig)
 RUWE and duplicate source : 0.93 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#45
 Note                      : FP:true

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


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