RECON: TNO occultation with 523717

Event between (523717) 14KY101 and star GA0680:12758545 with event index number of 2616837

Geocentric closest approach at 2024/08/03 13:16:24 UTC

J2000 position of star is 17:29:59.6 -21:10:37
Equinox of date position of star is 17:31:27.3 -21:11:40
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon. Moon is 1% illuminated.
Apparent brightness V=22.2

Object is 36.0 AU from the Sun and 35.4 AU from the Earth.
Apparent velocity is 14.4 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 580 seconds.
The 1-sigma cross-track error in the shadow position is 2459 km.

The object has an absolute magnitude Hv=6.5
Diameter=316.2 km assuming a 5% albedo -- 21.1 sec chord
Diameter=129.1 km assuming a 30% albedo -- 8.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523717, (2024/08/03 13:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:55.2 -26:29:04  0.9 14.81 129
35Eta Oph      17:11:47.4 -15:45:13  2.6  7.17 135
PPM 266825     17:26:10.4 -21:27:44  6.1  1.26 140
PPM 266907     17:29:44.3 -20:58:55  8.3  0.46 141
PPM 266927     17:30:44.4 -21:15:49  9.7  0.18 141
523717         17:31:27.9 -21:11:40 16.9       142
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, (2024/08/03 13:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.81 129
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.17 135
PPM 266825     17:24:42.0 -21:26:30  6.1  1.26 140
PPM 266907     17:28:16.2 -20:57:49  8.3  0.46 141
PPM 266927     17:29:16.1 -21:14:44  9.7  0.18 141
523717         17:29:59.6 -21:10:37 16.9       141
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:49:29 UT

Marc W. Buie, Southwest Research Institute

RECON