Cora»OccDetail

Stellar Occultation by (120347) Salacia on 2024-08-17 (23:06:46 UT)

Event Details
Occultation UUID [and db] : e7642806-9846-46ae-8bd1-110a134ec755 [cetnos] Occultation Date + Time : 2024-08-17 at 23:06:46 UT +/- 0.87 min [1] Object Designation : (120347) Salacia Star Designation : GDR3 2853444540521856896 Star Coordinates (ICRF) : RA = 23 57 24.7005, DE = +26 22 03.469 [2] Star Magnitudes : G = 15.95 mag, RP = 15.31 mag, BP = 16.45 mag Object Magnitude : V = 20.92 mag Estimated Magnitude Drop : 5.0 mag Estimated Max. Duration : 26.1 sec Speed of the shadow : 18.7 km/s Object Mean Diameter : 486.9 km (src: CORA+astorb) => apparent = 15 mas Apparent Motion : 0.0350 arcs/min @ PA = 271 deg Horizontal Parallax : 0.1970 arcs Dynamical Class : TNO Elongation to Moon & Sun : 74° (sunlit = 95%), Sun = 130° Cross-track uncertainty : 21.7 mas = 702 km = 1.44 path-width (1-sig) RUWE and duplicate source : 0.96 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#31 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] : e7642806-9846-46ae-8bd1-110a134ec755 [cetnos]

 Occultation Date + Time   : 2024-08-17 at 23:06:46 UT +/- 0.87 min  [1]
 Object Designation        : (120347) Salacia
 Star Designation          : GDR3 2853444540521856896
 Star Coordinates (ICRF)   : RA = 23 57 24.7005, DE = +26 22 03.469  [2]
 Star Magnitudes           : G = 15.95 mag, RP = 15.31 mag, BP = 16.45 mag
 Object Magnitude          : V = 20.92 mag
 Estimated Magnitude Drop  : 5.0 mag
 Estimated Max. Duration   : 26.1 sec
 Speed of the shadow       : 18.7 km/s
 Object Mean Diameter      : 486.9 km  (src: CORA+astorb) => apparent = 15 mas
 Apparent Motion           : 0.0350 arcs/min @ PA = 271 deg
 Horizontal Parallax       : 0.1970 arcs
 Dynamical Class           : TNO
 Elongation to Moon & Sun  : 74° (sunlit = 95%), Sun = 130°
 Cross-track uncertainty   : 21.7 mas = 702 km = 1.44 path-width (1-sig)
 RUWE and duplicate source : 0.96 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#31

 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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Apply ephem. offset (O-C) in RA & DE and CTU:
CTU: Cross-track uncertainty (zero means: use the nominal prediction value, see event details below). Offsets and CTU all in mas.