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Stellar Occultation by (81) Terpsichore on 2025-04-02 (20:17:39 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] : 5bdd9500-ddb6-11f0-547e-bcb6f5bdc2e5 [observed]

 Occultation Date + Time   : 2025-04-02 at 20:17:39 UT +/- 0.02 min  [1]
 Object Designation        : (81) Terpsichore
 Star Designation          : GDR3 0689225359178091392
 Star Coordinates (ICRF)   : RA = 08 51 37.0076, DE = +23 14 34.662  [2]
 Star Magnitudes           : G = 12.76 mag, RP = 12.29 mag, BP = 13.07 mag
 Object Magnitude          : V = 13.57 mag
 Estimated Magnitude Drop  : 1.2 mag
 Estimated Max. Duration   : 19.9 sec
 Speed of the shadow       : 6.0 km/s
 Object Mean Diameter      : 119.1 km  (src: astorb) => apparent = 75 mas
 Apparent Motion           : 0.2267 arcs/min @ PA = 148 deg
 Horizontal Parallax       : 4.0070 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 54° (sunlit = 26%), Sun = 115°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.01 path-width (1-sig)
 RUWE and duplicate source : 0.82 mas, dup.src = 1  (0:false, 1:true)

 Ephemeris Reference       : JPL#88
 Note                      : FP:true

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


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