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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Occultation Ground Track
------------------------------------------------------------------------------------------- Time[UT] \| Lat----CENTR----Lon \| Alt Azm Sun \| Lat----EDGE1----Lon \| Lat----EDGE2----Lon hh:mm:ss \| +DD.dddd +DDD.dddd \| deg deg deg \| +DD.dddd +DDD.dddd \| +DD.dddd +DDD.dddd ------------------------------------------------------------------------------------------- 00:52:43 +32.1764 +047.9901 +24 232 -10 +24.7576 +044.1672 +41.7473 +056.9928 00:53:35 +27.8284 +029.0325 +38 218 -25 +21.1962 +027.6672 +35.3412 +031.4585 00:54:27 +25.3947 +014.7395 +47 203 -34 +19.0399 +014.2970 +32.4152 +015.5655 00:55:18 +23.9935 +001.9513 +51 185 -40 +17.7555 +002.0775 +30.8221 +001.8710 00:56:10 +23.4080 -010.4588 +51 166 -43 +17.1907 -009.8491 +30.2047 -011.2987 00:57:01 +23.6364 -023.3184 +46 149 -42 +17.3459 -022.1455 +30.5584 -025.0680 00:57:53 +24.8984 -037.8010 +37 135 -36 +18.3781 -035.7001 +32.2435 -041.2033 00:58:45 +28.1739 -057.5089 +21 121 -24 +20.8643 -052.6874 +38.1591 -070.1156 Longitude measured positiv to the East. Azimuth (Azm) measured from North to East.

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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.