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Stellar Occultation by (171823) 2001 FS25 on 2024-09-22 (19:52:46 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] : 6b0341c0-ddb5-11f0-547e-01d2bfef6744 [observed]

 Occultation Date + Time   : 2024-09-22 at 19:52:46 UT +/- 0.02 min  [1]
 Object Designation        : (171823) 2001 FS25
 Star Designation          : GDR3 0100864047066928000
 Star Coordinates (ICRF)   : RA = 02 12 33.8678, DE = +22 44 52.824  [2]
 Star Magnitudes           : G = 10.96 mag, RP = 10.28 mag, BP = 11.48 mag
 Object Magnitude          : V = 19.63 mag
 Estimated Magnitude Drop  : 8.7 mag
 Estimated Max. Duration   : 0.4 sec
 Speed of the shadow       : 5.2 km/s
 Object Mean Diameter      : 2.1 km  (src: astorb) => apparent = 2 mas
 Apparent Motion           : 0.2983 arcs/min @ PA = 289 deg
 Horizontal Parallax       : 6.0330 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 27° (sunlit = 71%), Sun = 141°
 Cross-track uncertainty   : 1.7 mas = 1 km = 0.86 path-width (1-sig)
 RUWE and duplicate source : 1.17 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#41
 Note                      : FP:true

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


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