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Stellar Occultation by (351) Yrsa on 2025-10-03 (03:23:42 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] : 7fb42a00-ddb8-11f0-547e-20d27f4f6524 [observed]

 Occultation Date + Time   : 2025-10-03 at 03:23:42 UT +/- 0.02 min  [1]
 Object Designation        : (351) Yrsa
 Star Designation          : GDR3 0001686723852064128
 Star Coordinates (ICRF)   : RA = 02 54 21.4872, DE = +03 27 08.954  [2]
 Star Magnitudes           : G = 13.18 mag, RP = 12.57 mag, BP = 13.63 mag
 Object Magnitude          : V = 13.48 mag
 Estimated Magnitude Drop  : 0.9 mag
 Estimated Max. Duration   : 5.1 sec
 Speed of the shadow       : 7.8 km/s
 Object Mean Diameter      : 39.6 km  (src: astorb) => apparent = 29 mas
 Apparent Motion           : 0.3433 arcs/min @ PA = 240 deg
 Horizontal Parallax       : 4.6540 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 85° (sunlit = 80%), Sun = 146°
 Cross-track uncertainty   : 2.0 mas = 2 km = 0.07 path-width (1-sig)
 RUWE and duplicate source : 0.96 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#80
 Note                      : FP:true

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


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