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Stellar Occultation by (77894) 2001 SY263 on 2023-09-11 (22:12:42 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] : 08a8b010-ddb4-11f0-547e-a59cfbe44fc1 [observed]

 Occultation Date + Time   : 2023-09-11 at 22:12:42 UT +/- 0.04 min  [1]
 Object Designation        : (77894) 2001 SY263
 Star Designation          : GDR3 1756702234644085120
 Star Coordinates (ICRF)   : RA = 20 57 41.9672, DE = +10 35 07.901  [2]
 Star Magnitudes           : G = 12.4 mag, RP = 11.91 mag, BP = 12.73 mag
 Object Magnitude          : V = 19.45 mag
 Estimated Magnitude Drop  : 7.1 mag
 Estimated Max. Duration   : 0.9 sec
 Speed of the shadow       : 12.8 km/s
 Object Mean Diameter      : 10.9 km  (src: astorb) => apparent = 4 mas
 Apparent Motion           : 0.2667 arcs/min @ PA = 243 deg
 Horizontal Parallax       : 2.2070 arcs
 Dynamical Class           : JTRO
 Elongation to Moon & Sun  : 148° (sunlit = 9%), Sun = 142°
 Cross-track uncertainty   : 7.3 mas = 21 km = 1.94 path-width (1-sig)
 RUWE and duplicate source : 1.0 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#37
 Note                      : FP:true

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


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