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Stellar Occultation by (1330) Spiridonia on 2023-08-27 (21:49:43 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] : 7b834675-e766-474e-ac58-3d9ea92cb9c1 [observed]

 Occultation Date + Time   : 2023-08-27 at 21:49:43 UT +/- 0.17 min  [1]
 Object Designation        : (1330) Spiridonia
 Star Designation          : GDR3 4251447702453387648
 Star Coordinates (ICRF)   : RA = 18 46 42.4621, DE = -08 58 56.250  [2]
 Star Magnitudes           : G = 15.37 mag, RP = 14.33 mag, BP = 16.49 mag
 Object Magnitude          : V = 15.75 mag
 Estimated Magnitude Drop  : 1.0 mag
 Estimated Max. Duration   : 6.7 sec
 Object Mean Diameter      : 55.5 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 8.3 km/s
 Elongation to Moon & Sun  : 21° (sunlit = 86%), Sun = 126°
 Cross-track uncertainty   : 0.8 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 1.02 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#60

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


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