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Stellar Occultation by (1866) Sisyphus on 2026-04-17 (04:16:48 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] : 217d5f10-33f3-11f1-6999-5d1eb97ebcb6 [asteroids]

 Occultation Date + Time   : 2026-04-17 at 04:16:48 UT +/- 0.0 min  [1]
 Object Designation        : (1866) Sisyphus
 Star Designation          : GDR3 1549974399147317632
 Star Coordinates (ICRF)   : RA = 13 32 58.9618, DE = +44 48 31.628  [2]
 Star Magnitudes           : G = 9.65 mag, RP = 9.25 mag, BP = 9.86 mag
 Object Magnitude          : V = 17.39 mag
 Estimated Magnitude Drop  : 7.7 mag
 Estimated Max. Duration   : 0.6 sec
 Speed of the shadow       : 20.0 km/s
 Object Mean Diameter      : 11.0 km  (src: astorb) => apparent = 7 mas
 Apparent Motion           : 0.7500 arcs/min @ PA = 263 deg
 Horizontal Parallax       : 3.9950 arcs
 Dynamical Class           : NEO
 Elongation to Moon & Sun  : 123° (sunlit = 0%), Sun = 125°
 Cross-track uncertainty   : 1.3 mas = 2 km = 0.19 path-width (1-sig)
 RUWE and duplicate source : 7.42 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#1183
 Note                      : FP:true

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


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