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Stellar Occultation by (18744) 1999 AU on 2023-12-30 (19:41:54 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] : 9bc7078b-984d-46d9-9f10-8ff057410df7 [observed]

 Occultation Date + Time   : 2023-12-30 at 19:41:54 UT +/- 0.02 min  [1]
 Object Designation        : (18744) 1999 AU
 Star Designation          : GDR3 0187110525131943680
 Star Coordinates (ICRF)   : RA = 05 16 25.4770, DE = +36 48 53.291  [2]
 Star Magnitudes           : G = 16.22 mag, RP = 15.51 mag, BP = 16.53 mag
 Object Magnitude          : V = 17.7 mag
 Estimated Magnitude Drop  : 1.7 mag
 Estimated Max. Duration   : 0.4 sec
 Object Mean Diameter      : 5.7 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 12.9 km/s
 Elongation to Moon & Sun  : 61° (sunlit = 87%), Sun = 158°
 Cross-track uncertainty   : 1.8 mas = 2 km = 0.39 path-width (1-sig)
 RUWE and duplicate source : 1.35 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#49

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


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