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Stellar Occultation by (53) Kalypso on 2025-08-17 (02:42:15 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] : 464e0fc0-ddb7-11f0-547e-d768efabcc0d [observed]

 Occultation Date + Time   : 2025-08-17 at 02:42:15 UT +/- 0.01 min  [1]
 Object Designation        : (53) Kalypso
 Star Designation          : GDR3 6884346664363798528
 Star Coordinates (ICRF)   : RA = 21 16 32.0047, DE = -15 14 53.810  [2]
 Star Magnitudes           : G = 13.98 mag, RP = 13.42 mag, BP = 14.38 mag
 Object Magnitude          : V = 12.98 mag
 Estimated Magnitude Drop  : 0.4 mag
 Estimated Max. Duration   : 8.6 sec
 Speed of the shadow       : 13.5 km/s
 Object Mean Diameter      : 115.4 km  (src: astorb) => apparent = 81 mas
 Apparent Motion           : 0.5700 arcs/min @ PA = 246 deg
 Horizontal Parallax       : 4.5010 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 109° (sunlit = 40%), Sun = 172°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 1.08 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#205
 Note                      : FP:true

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


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