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Stellar Occultation by (20533) Irmabonham on 2023-05-09 (23:00:30 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] : 9631b590-ddb3-11f0-547e-e349fefda083 [observed]

 Occultation Date + Time   : 2023-05-09 at 23:00:30 UT +/- 0.0 min  [1]
 Object Designation        : (20533) Irmabonham
 Star Designation          : GDR3 6262363313177152128
 Star Coordinates (ICRF)   : RA = 15 56 31.2314, DE = -16 13 15.445  [2]
 Star Magnitudes           : G = 12.97 mag, RP = 12.45 mag, BP = 13.32 mag
 Object Magnitude          : V = 17.98 mag
 Estimated Magnitude Drop  : 5.0 mag
 Estimated Max. Duration   : 0.5 sec
 Speed of the shadow       : 10.4 km/s
 Object Mean Diameter      : 5.1 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.4867 arcs/min @ PA = 281 deg
 Horizontal Parallax       : 4.9940 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 44° (sunlit = 79%), Sun = 168°
 Cross-track uncertainty   : 0.7 mas = 0 km = 0.18 path-width (1-sig)
 RUWE and duplicate source : 1.06 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#53
 Note                      : FP:true

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


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