RECON: TNO occultation with 523761

Event between (523761) 14WU509 and star GA0920:01265082 with event index number of 2614247

Geocentric closest approach at 2026/03/16 20:02:43 UTC

J2000 position of star is 06:18:12.1 +03:49:02
Equinox of date position of star is 06:19:29.5 +03:48:21
Stellar brightness G=13.4, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 124 degrees from the moon. Moon is 6% illuminated.
Apparent brightness V=22.2

Object is 40.3 AU from the Sun and 40.1 AU from the Earth.
Apparent velocity is 9.6 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 234 seconds.
The 1-sigma cross-track error in the shadow position is 5570 km.

The object has an absolute magnitude Hv=6.0
Diameter=398.1 km assuming a 5% albedo -- 39.2 sec chord
Diameter=162.5 km assuming a 30% albedo -- 16.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 523761, (2026/03/16 20:03UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:35.5 +07:24:35  0.4  6.76 119
34Del Ori      05:33:20.8 -00:16:54  2.2 12.25 112
PPM 150401     06:24:41.4 +03:44:57  6.0  1.27 125
PPM 150256     06:19:39.8 +03:58:20  8.4  0.17 124
523761         06:19:35.0 +03:48:18 13.4       124
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 523761, (2026/03/16 20:03UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  6.76 119
34Del Ori      05:32:00.4 -00:17:57  2.2 12.25 112
PPM 150401     06:23:18.5 +03:45:52  6.0  1.27 125
PPM 150256     06:18:16.8 +03:59:04  8.4  0.17 124
523761         06:18:12.1 +03:49:02 13.4       124
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:25:50 UT

Marc W. Buie, Southwest Research Institute

RECON