Cora»OccDetail

Stellar Occultation by (50000) Quaoar on 2026-06-21 (00:55:42 UT)

Event Details
Occultation UUID [and db] : f0f04bf0-f929-11ef-4809-3f10f77f2856 [cetnos] Occultation Date + Time : 2026-06-21 at 00:55:42 UT +/- 0.33 min [1] Object Designation : (50000) Quaoar Star Designation : GDR3 4101955932488319872 Star Coordinates (ICRF) : RA = 18 47 19.9823, DE = -14 47 27.794 [2] Star Magnitudes : G = 14.74 mag, RP = 13.73 mag, BP = 15.8 mag Object Magnitude : V = 18.74 mag Estimated Magnitude Drop : 4.0 mag Estimated Max. Duration : 46.8 sec Speed of the shadow : 24.0 km/s Object Mean Diameter : 1125.8 km (src: CORA+astorb) => apparent = 37 mas Apparent Motion : 0.0483 arcs/min @ PA = 267 deg Horizontal Parallax : 0.2110 arcs Dynamical Class : TNO Elongation to Moon & Sun : 112° (sunlit = 41%), Sun = 166° Cross-track uncertainty : 3.0 mas = 90 km = 0.08 path-width (1-sig) RUWE and duplicate source : 0.94 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#47 Object is a <TNOs are Cool> target ! [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and db] : f0f04bf0-f929-11ef-4809-3f10f77f2856 [cetnos]

 Occultation Date + Time   : 2026-06-21 at 00:55:42 UT +/- 0.33 min  [1]
 Object Designation        : (50000) Quaoar
 Star Designation          : GDR3 4101955932488319872
 Star Coordinates (ICRF)   : RA = 18 47 19.9823, DE = -14 47 27.794  [2]
 Star Magnitudes           : G = 14.74 mag, RP = 13.73 mag, BP = 15.8 mag
 Object Magnitude          : V = 18.74 mag
 Estimated Magnitude Drop  : 4.0 mag
 Estimated Max. Duration   : 46.8 sec
 Speed of the shadow       : 24.0 km/s
 Object Mean Diameter      : 1125.8 km  (src: CORA+astorb) => apparent = 37 mas
 Apparent Motion           : 0.0483 arcs/min @ PA = 267 deg
 Horizontal Parallax       : 0.2110 arcs
 Dynamical Class           : TNO
 Elongation to Moon & Sun  : 112° (sunlit = 41%), Sun = 166°
 Cross-track uncertainty   : 3.0 mas = 90 km = 0.08 path-width (1-sig)
 RUWE and duplicate source : 0.94 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#47

 Object is a <TNOs are Cool> target !

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

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CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.