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Stellar Occultation by (856) Backlunda on 2023-06-17 (21:28:13 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] : 3f6c4c50-ddb0-11f0-547e-2b6ceede9ae2 [observed]

 Occultation Date + Time   : 2023-06-17 at 21:28:13 UT +/- 0.0 min  [1]
 Object Designation        : (856) Backlunda
 Star Designation          : GDR3 4198453131701944192
 Star Coordinates (ICRF)   : RA = 19 13 17.5960, DE = -11 10 32.027  [2]
 Star Magnitudes           : G = 10.76 mag, RP = 10.27 mag, BP = 11.09 mag
 Object Magnitude          : V = 14.15 mag
 Estimated Magnitude Drop  : 3.4 mag
 Estimated Max. Duration   : 5.7 sec
 Speed of the shadow       : 9.2 km/s
 Object Mean Diameter      : 52.0 km  (src: astorb) => apparent = 52 mas
 Apparent Motion           : 0.5450 arcs/min @ PA = 244 deg
 Horizontal Parallax       : 6.3270 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 151° (sunlit = 0%), Sun = 156°
 Cross-track uncertainty   : 0.3 mas = 0 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.2 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#112
 Note                      : FP:true

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


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