RECON: TNO occultation with 135024

Event between (135024) 01KO76 and star GA0660:07365905 with event index number of 1486774

Geocentric closest approach at 2025/09/30 11:18:26 UTC

J2000 position of star is 16:24:54.8 -22:33:22
Equinox of date position of star is 16:26:22.4 -22:36:38
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 35 degrees from the moon. Moon is 55% illuminated.
Apparent brightness V=23.5

Object is 43.4 AU from the Sun and 43.8 AU from the Earth.
Apparent velocity is 19.4 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 481 seconds.
The 1-sigma cross-track error in the shadow position is 2776 km.

The object has an absolute magnitude Hv=7.0
Diameter=251.2 km assuming a 5% albedo -- 12.4 sec chord
Diameter=102.6 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is 7:4EEE
 
 
 
 
 
 
 
 

Star training set for 135024, (2025/09/30 11:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:59.4 -26:29:13  0.9  4.01  33
8Bet1Sco       16:06:56.3 -19:52:26  2.6  5.31  40
19Omi Sco      16:22:11.4 -24:13:46  4.0  1.89  35
PPM 265494     16:25:57.5 -22:42:45  8.1  0.15  35
PPM 265501     16:26:23.7 -22:42:59  9.2  0.10  35
135024         16:26:27.1 -22:36:49 14.9        35
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 135024, (2025/09/30 11:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  4.01  33
8Bet1Sco       16:05:26.2 -19:48:20  2.6  5.31  40
19Omi Sco      16:20:38.2 -24:10:10  4.0  1.89  35
PPM 265494     16:24:25.2 -22:39:18  8.1  0.15  35
PPM 265501     16:24:51.4 -22:39:33  9.2  0.10  35
135024         16:24:54.8 -22:33:22 14.9        35
Positions are for J2000

Event circumstances last updated at 2024/06/09 02:46:15 UT

Marc W. Buie, Southwest Research Institute

RECON