RECON: TNO occultation with 535032

Event between (535032) 14WP510 and star GA1140:01258023 with event index number of 2260713

Geocentric closest approach at 2025/11/07 19:18:36 UTC

J2000 position of star is 05:31:42.8 +24:33:00
Equinox of date position of star is 05:33:03.4 +24:33:53
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 7 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=22.9

TNO is 35.9 AU from the Sun and 35.2 AU from the Earth.
The TNO is moving 18.8 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 286 seconds.
The 1-sigma cross-track error in the shadow position is 1887 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 11.1 sec chord
Diameter=85.3 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 535032, (2025/11/07 19:30UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.4 +16:33:34  0.8 15.32  13
Alnath         05:27:55.7 +28:37:37  1.6  4.23   5
125 Tau        05:41:20.4 +25:54:33  5.2  2.26   8
PPM 094479     05:35:06.0 +24:38:41  7.0  0.42   7
PPM 094471     05:34:39.0 +24:22:51  9.2  0.36   7
PPM 094433     05:32:20.1 +24:21:02 11.1  0.31   7
535032         05:33:17.9 +24:34:02 16.4         7
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 535032, (2025/11/07 19:30UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 15.32  13
Alnath         05:26:17.6 +28:36:23  1.6  4.23   5
125 Tau        05:39:44.2 +25:53:49  5.2  2.26   8
PPM 094479     05:33:30.8 +24:37:44  7.0  0.42   7
PPM 094471     05:33:04.0 +24:21:52  9.2  0.36   7
PPM 094433     05:30:45.1 +24:19:57 11.1  0.31   7
535032         05:31:42.8 +24:33:00 16.4         7
Positions are for J2000

Event circumstances last updated at 2021/11/28 00:33:48 UT

Marc W. Buie, Southwest Research Institute

RECON