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Stellar Occultation by (939) Isberga on 2023-04-30 (20:43:03 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] : 928612b0-ddb3-11f0-547e-5c0cf6fbbfef [observed]

 Occultation Date + Time   : 2023-04-30 at 20:43:03 UT +/- 0.02 min  [1]
 Object Designation        : (939) Isberga
 Star Designation          : GDR3 0630510411758988416
 Star Coordinates (ICRF)   : RA = 09 22 07.3808, DE = +14 40 49.984  [2]
 Star Magnitudes           : G = 12.8 mag, RP = 12.37 mag, BP = 13.04 mag
 Object Magnitude          : V = 17.04 mag
 Estimated Magnitude Drop  : 4.3 mag
 Estimated Max. Duration   : 1.7 sec
 Speed of the shadow       : 10.5 km/s
 Object Mean Diameter      : 17.8 km  (src: astorb) => apparent = 11 mas
 Apparent Motion           : 0.3783 arcs/min @ PA = 110 deg
 Horizontal Parallax       : 3.8280 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 25° (sunlit = 77%), Sun = 98°
 Cross-track uncertainty   : 7.5 mas = 12 km = 0.70 path-width (1-sig)
 RUWE and duplicate source : 1.03 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#72
 Note                      : FP:true

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


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