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Stellar Occultation by (140) Siwa on 2024-11-28 (02:48:19 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] : ac570ad0-ddb5-11f0-547e-61cefe76b52e [observed]

 Occultation Date + Time   : 2024-11-28 at 02:48:19 UT +/- 0.01 min  [1]
 Object Designation        : (140) Siwa
 Star Designation          : GDR3 0865268582514916864
 Star Coordinates (ICRF)   : RA = 07 35 50.6380, DE = +21 03 44.506  [2]
 Star Magnitudes           : G = 13.27 mag, RP = 12.78 mag, BP = 13.59 mag
 Object Magnitude          : V = 13.73 mag
 Estimated Magnitude Drop  : 1.0 mag
 Estimated Max. Duration   : 15.6 sec
 Speed of the shadow       : 7.1 km/s
 Object Mean Diameter      : 109.8 km  (src: astorb) => apparent = 61 mas
 Apparent Motion           : 0.2350 arcs/min @ PA = 285 deg
 Horizontal Parallax       : 3.5430 arcs
 Dynamical Class           : MBA
 Elongation to Moon & Sun  : 99° (sunlit = 9%), Sun = 134°
 Cross-track uncertainty   : 1.0 mas = 1 km = 0.02 path-width (1-sig)
 RUWE and duplicate source : 1.13 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL187
 Note                      : FP:true

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


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SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
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