Cora»OccDetail

Stellar Occultation by (225088) Gonggong on 2024-10-07 (20:14:38 UT)

Event Details
Occultation UUID [and db] : 4a364180-df9b-11f0-76c1-b4b4e5ece438 [special] Occultation Date + Time : 2024-10-07 at 20:14:38 UT +/- 1.16 min [1] Object Designation : (225088) Gonggong Star Designation : GDR3 2602857349400467456 Star Coordinates (ICRF) : RA = 22 27 42.2511, DE = -10 46 32.266 [2] Star Magnitudes : G = 18.99 mag, RP = 18.01 mag, BP = 20.05 mag Object Magnitude : V = 21.43 mag Estimated Magnitude Drop : 2.6 mag Estimated Max. Duration : 77.2 sec Speed of the shadow : 20.5 km/s Object Mean Diameter : 1585.0 km (src: CORA) => apparent = 25 mas Apparent Motion : 0.0183 arcs/min @ PA = 253 deg Horizontal Parallax : 0.0990 arcs Dynamical Class : TNO Elongation to Moon & Sun : 84° (sunlit = 22%), Sun = 140° Cross-track uncertainty : 21.8 mas = 1404 km = 0.89 path-width (1-sig) RUWE and duplicate source : 1.09 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#22 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

Event Details

 Occultation UUID [and db] : 4a364180-df9b-11f0-76c1-b4b4e5ece438 [special]

 Occultation Date + Time   : 2024-10-07 at 20:14:38 UT +/- 1.16 min  [1]
 Object Designation        : (225088) Gonggong
 Star Designation          : GDR3 2602857349400467456
 Star Coordinates (ICRF)   : RA = 22 27 42.2511, DE = -10 46 32.266  [2]
 Star Magnitudes           : G = 18.99 mag, RP = 18.01 mag, BP = 20.05 mag
 Object Magnitude          : V = 21.43 mag
 Estimated Magnitude Drop  : 2.6 mag
 Estimated Max. Duration   : 77.2 sec
 Speed of the shadow       : 20.5 km/s
 Object Mean Diameter      : 1585.0 km  (src: CORA) => apparent = 25 mas
 Apparent Motion           : 0.0183 arcs/min @ PA = 253 deg
 Horizontal Parallax       : 0.0990 arcs
 Dynamical Class           : TNO
 Elongation to Moon & Sun  : 84° (sunlit = 22%), Sun = 140°
 Cross-track uncertainty   : 21.8 mas = 1404 km = 0.89 path-width (1-sig)
 RUWE and duplicate source : 1.09 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#22
 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

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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.