RECON: TNO occultation with 535229

Event between (535229) 14YG50 and star GA1080:03084538 with event index number of 2244833

Geocentric closest approach at 2026/01/08 02:13:43 UTC

J2000 position of star is 08:26:32.8 +19:09:47
Equinox of date position of star is 08:27:52.7 +19:05:09
Stellar brightness G=12.7, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 44 degrees from the moon. Moon is 75% illuminated.
Apparent brightness V=22.7

Object is 35.7 AU from the Sun and 34.8 AU from the Earth.
Apparent velocity is 24.2 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 183 seconds.
The 1-sigma cross-track error in the shadow position is 3180 km.

The object has an absolute magnitude Hv=7.2
Diameter=215.8 km assuming a 5% albedo -- 8.9 sec chord
Diameter=88.1 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 535229, (2026/01/08 02:15UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.5 +27:57:40  1.1 12.94  56
20 Cnc         08:24:51.1 +18:14:49  5.9  1.12  45
PPM 125249     08:27:20.0 +19:31:07  8.5  0.47  44
PPM 125250     08:27:20.6 +18:58:57  9.9  0.19  44
PPM 125267     08:28:10.6 +18:57:01 10.1  0.13  44
535229         08:28:02.5 +19:04:35 12.7        44
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 535229, (2026/01/08 02:15UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 12.94  56
20 Cnc         08:23:21.7 +18:19:55  5.9  1.12  45
PPM 125249     08:25:50.1 +19:36:18  8.5  0.47  44
PPM 125250     08:25:50.9 +19:04:08  9.9  0.19  44
PPM 125267     08:26:41.0 +19:02:14 10.1  0.13  44
535229         08:26:32.8 +19:09:47 12.7        44
Positions are for J2000

Event circumstances last updated at 2023/03/04 04:10:36 UT

Marc W. Buie, Southwest Research Institute

RECON