RECON: TNO occultation with 523764

Event between (523764) 14WC510 and star GA0920:02483422 with event index number of 2613439

Geocentric closest approach at 2025/11/13 03:05:59 UTC

J2000 position of star is 07:16:15.2 +02:16:57
Equinox of date position of star is 07:17:30.7 +02:14:18
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 46 degrees from the moon. Moon is 41% illuminated.
Apparent brightness V=22.1

Object is 29.8 AU from the Sun and 29.3 AU from the Earth.
Apparent velocity is 12.7 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 205 seconds.
The 1-sigma cross-track error in the shadow position is 1640 km.

The object has an absolute magnitude Hv=7.2
Diameter=212.8 km assuming a 5% albedo -- 16.8 sec chord
Diameter=86.9 km assuming a 30% albedo -- 6.9 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 
 
 

Star training set for 523764, (2025/11/13 03:09UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:17.4 -16:45:07 -1.5 20.50  60
Alhena         06:39:12.3 +16:22:30  1.9 17.00  53
PPM 152385     07:20:43.5 +02:41:29  5.9  0.90  45
PPM 152289     07:17:57.1 +01:49:49  7.6  0.41  46
PPM 152314     07:18:30.6 +02:19:42  8.9  0.25  46
523764         07:17:36.0 +02:14:06 16.3        45
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 523764, (2025/11/13 03:09UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.0 -16:43:24 -1.5 20.50  60
Alhena         06:37:42.8 +16:23:57  1.9 17.00  53
PPM 152385     07:19:22.4 +02:44:26  5.9  0.90  45
PPM 152289     07:16:36.5 +01:52:41  7.6  0.41  46
PPM 152314     07:17:09.7 +02:22:35  8.9  0.25  46
523764         07:16:15.2 +02:16:57 16.3        46
Positions are for J2000

Event circumstances last updated at 2024/03/03 06:05:51 UT

Marc W. Buie, Southwest Research Institute

RECON