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Stellar Occultation by (19521) Chaos on 2023-03-29 (20:00:16 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] : 5e566f20-ddb4-11f0-547e-f7bcf8ebd945 [observed]

 Occultation Date + Time   : 2023-03-29 at 20:00:16 UT +/- 2.28 min  [1]
 Object Designation        : (19521) Chaos
 Star Designation          : GDR3 3444124860094090752
 Star Coordinates (ICRF)   : RA = 05 53 42.3874, DE = +31 12 49.046  [2]
 Star Magnitudes           : G = 13.5 mag, RP = 12.89 mag, BP = 13.91 mag
 Object Magnitude          : V = 20.97 mag
 Estimated Magnitude Drop  : 7.5 mag
 Estimated Max. Duration   : 40.8 sec
 Speed of the shadow       : 10.0 km/s
 Object Mean Diameter      : 406.9 km  (src: astorb) => apparent = 14 mas
 Apparent Motion           : 0.0200 arcs/min @ PA = 108 deg
 Horizontal Parallax       : 0.2130 arcs
 Dynamical Class           : TNO
 Elongation to Moon & Sun  : 18° (sunlit = 57%), Sun = 80°
 Cross-track uncertainty   : 26.7 mas = 799 km = 1.96 path-width (1-sig)
 RUWE and duplicate source : 2.68 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL18
 Note                      : FP:true

 Object is a <TNOs are Cool> target !

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


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