RECON: TNO occultation with 523717

Event between (523717) 14KY101 and star GA0680:11142160 with event index number of 2616365

Geocentric closest approach at 2023/08/20 02:59:38 UTC

J2000 position of star is 17:22:01.3 -20:48:36
Equinox of date position of star is 17:23:25.6 -20:49:52
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 74 degrees from the moon. Moon is 12% illuminated.
Apparent brightness V=22.2

Object is 35.9 AU from the Sun and 35.4 AU from the Earth.
Apparent velocity is 7.1 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 820 seconds.
The 1-sigma cross-track error in the shadow position is 4372 km.

The object has an absolute magnitude Hv=6.5
Diameter=316.2 km assuming a 5% albedo -- 42.5 sec chord
Diameter=129.1 km assuming a 30% albedo -- 17.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523717, (2023/08/20 03:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.6 -26:28:57  0.9 13.29  62
35Eta Oph      17:11:44.1 -15:45:09  2.6  5.79  70
40Xi Oph       17:22:25.5 -21:08:10  3.9  0.38  73
PPM 266750     17:23:16.0 -20:35:27  7.2  0.24  73
PPM 266758     17:23:28.5 -20:45:45  9.0  0.07  74
523717         17:23:25.8 -20:49:52 15.8        74
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, (2023/08/20 03:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.29  62
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.79  70
40Xi Oph       17:21:00.8 -21:06:51  3.9  0.38  73
PPM 266750     17:21:51.6 -20:34:10  7.2  0.24  73
PPM 266758     17:22:04.0 -20:44:29  9.0  0.07  74
523717         17:22:01.3 -20:48:36 15.8        74
Positions are for J2000

Event circumstances last updated at 2023/07/29 02:38:32 UT

Marc W. Buie, Southwest Research Institute

RECON