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Stellar Occultation by (74789) 1999 SY5 on 2024-12-22 (03:55:21 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] : 76f73f10-c35b-11ef-5276-cbdefacbb769 [observed]

 Occultation Date + Time   : 2024-12-22 at 03:55:21 UT +/- 0.01 min  [1]
 Object Designation        : (74789) 1999 SY5
 Star Designation          : GDR3 3060600365220976256
 Star Coordinates (ICRF)   : RA = 07 27 45.3566, DE = -03 10 15.794  [2]
 Star Magnitudes           : G = 13.17 mag, RP = 12.54 mag, BP = 13.64 mag
 Object Magnitude          : V = 16.29 mag
 Estimated Magnitude Drop  : 3.2 mag
 Estimated Max. Duration   : 0.5 sec
 Object Mean Diameter      : 4 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 9.6 km/s
 Elongation to Moon & Sun  : 62° (sunlit = 57%), Sun = 146°
 Cross-track uncertainty   : 2.7 mas = 1 km = 0.40 path-width (1-sig)
 RUWE and duplicate source : 1.02 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#48

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


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