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Stellar Occultation by (30774) 1987 BU1 on 2023-11-04 (18:01:19 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] : 05027f4b-b464-4e50-b4c7-3a9022be5f44 [observed]

 Occultation Date + Time   : 2023-11-04 at 18:01:19 UT +/- 0.15 min  [1]
 Object Designation        : (30774) 1987 BU1
 Star Designation          : GDR3 2646347677138876288
 Star Coordinates (ICRF)   : RA = 23 38 03.1489, DE = +01 51 57.852  [2]
 Star Magnitudes           : G = 9.73 mag, RP = 9.04 mag, BP = 10.27 mag
 Object Magnitude          : V = 18.78 mag
 Estimated Magnitude Drop  : 9.1 mag
 Estimated Max. Duration   : 1.0 sec
 Object Mean Diameter      : 3.1 km  (src: astorb)
 Orbital Class             : MBA
 Speed of the shadow       : 3.1 km/s
 Elongation to Moon & Sun  : 129° (sunlit = 56%), Sun = 134°
 Cross-track uncertainty   : 6.0 mas = 6 km = 2.06 path-width (1-sig)
 RUWE and duplicate source : 1.14 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#36

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


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