RECON: TNO occultation with 523713

Event between (523713) 14JX80 and star GA0940:05653681 with event index number of 2377388

Geocentric closest approach at 2025/06/28 03:51:50 UTC

J2000 position of star is 17:55:52.1 +05:04:48
Equinox of date position of star is 17:57:02.0 +05:04:41
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 128 degrees from the moon. Moon is 10% illuminated.
Apparent brightness V=21.9

Object is 36.7 AU from the Sun and 35.8 AU from the Earth.
Apparent velocity is 23.5 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 77 seconds.
The 1-sigma cross-track error in the shadow position is 1311 km.

The object has an absolute magnitude Hv=6.2
Diameter=340.4 km assuming a 5% albedo -- 15.0 sec chord
Diameter=139.0 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is 5:2EEE+5:2EII
 
 
 
 
 
 
 
 

Star training set for 523713, (2025/06/28 03:53UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:48.1 +38:48:30  0.0 34.97 112
60Bet Oph      17:44:44.0 +04:33:30  2.8  3.13 125
PPM 164771     17:54:28.8 +06:05:53  5.8  1.21 126
PPM 164844     17:57:16.5 +05:09:33  7.6  0.09 128
523713         17:57:07.5 +05:04:40 15.4       128
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 523713, (2025/06/28 03:53UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 34.97 112
60Bet Oph      17:43:28.3 +04:34:06  2.8  3.13 125
PPM 164771     17:53:14.0 +06:06:07  5.8  1.21 126
PPM 164844     17:56:01.2 +05:09:41  7.6  0.09 128
523713         17:55:52.1 +05:04:48 15.4       128
Positions are for J2000

Event circumstances last updated at 2023/08/21 03:01:26 UT

Marc W. Buie, Southwest Research Institute

RECON