RECON: TNO occultation with 523717

Event between (523717) 14KY101 and star GA0680:18893915 with event index number of 2618340

Geocentric closest approach at 2026/06/13 19:54:26 UTC

J2000 position of star is 17:48:57.2 -21:50:52
Equinox of date position of star is 17:50:25.5 -21:51:14
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 156 degrees from the moon. Moon is 3% illuminated.
Apparent brightness V=22.1

Object is 36.4 AU from the Sun and 35.4 AU from the Earth.
Apparent velocity is 24.3 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 483 seconds.
The 1-sigma cross-track error in the shadow position is 3263 km.

The object has an absolute magnitude Hv=6.5
Diameter=316.2 km assuming a 5% albedo -- 12.5 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523717, (2026/06/13 19:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.0 -26:29:18  0.9 18.70 175
35Eta Oph      17:11:53.8 -15:45:21  2.6 10.99 162
PPM 267309     17:49:21.6 -22:29:07  6.1  0.69 156
PPM 267349     17:50:48.0 -21:58:14  9.4  0.13 156
523717         17:50:32.7 -21:51:16 16.5       156
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 523717, (2026/06/13 19:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.70 175
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.99 162
PPM 267309     17:47:45.6 -22:28:40  6.1  0.69 156
PPM 267349     17:49:12.4 -21:57:51  9.4  0.13 156
523717         17:48:57.2 -21:50:52 16.5       156
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:27:04 UT

Marc W. Buie, Southwest Research Institute

RECON