RECON: TNO occultation with 523746

Event between (523746) 14UT114 and star GA1200:02948771 with event index number of 2323176

Geocentric closest approach at 2025/03/15 01:08:09 UTC

J2000 position of star is 07:17:33.5 +30:07:54
Equinox of date position of star is 07:19:06.1 +30:05:11
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 76 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=21.3

Object is 16.6 AU from the Sun and 16.2 AU from the Earth.
Apparent velocity is 6.6 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 111 seconds.
The 1-sigma cross-track error in the shadow position is 701 km.

The object has an absolute magnitude Hv=8.8
Diameter=95.5 km assuming a 5% albedo -- 16.0 sec chord
Diameter=39.0 km assuming a 30% albedo -- 6.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523746, (2025/03/15 01:09UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:51.3 +27:57:48  1.1  6.41  70
PPM 072652     07:19:40.6 +30:54:31  6.0  0.83  76
PPM 072660     07:20:02.6 +30:46:38  8.4  0.72  76
PPM 072645     07:19:22.5 +30:19:56  9.9  0.25  76
523746         07:19:09.4 +30:05:05 16.5        76
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 523746, (2025/03/15 01:09UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.8 +28:01:33  1.1  6.41  70
PPM 072652     07:18:04.1 +30:57:21  6.0  0.83  76
PPM 072660     07:18:26.2 +30:49:29  8.4  0.72  76
PPM 072645     07:17:46.4 +30:22:46  9.9  0.25  76
523746         07:17:33.5 +30:07:54 16.5        76
Positions are for J2000

Event circumstances last updated at 2024/05/05 03:30:20 UT

Marc W. Buie, Southwest Research Institute

RECON