RECON: TNO occultation with 576162

Event between (576162) 12GT41 and star GA0780:23024548 with event index number of 2740353

Geocentric closest approach at 2029/04/23 18:06:00 UTC

J2000 position of star is 20:32:23.1 -10:14:48
Equinox of date position of star is 20:33:38.0 -10:10:03
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 159 degrees from the moon. Moon is 71% illuminated.
TNO apparent brightness V=22.6

TNO is 19.2 AU from the Sun and 19.2 AU from the Earth.
The TNO is moving 9.0 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 726 seconds.
The 1-sigma cross-track error in the shadow position is 2265 km.

The TNO has an absolute magnitude Hv=9.5
Diameter=73.8 km assuming a 5% albedo -- 8.2 sec chord
Diameter=30.1 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 576162, (2029/04/23 18:06UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:15.7 -29:27:58  1.2 39.00 154
Tarazed        19:47:39.2 +10:41:12  2.7 23.80 142
PPM 204158     20:33:59.6 -09:45:06  5.6  0.39 159
PPM 237599     20:35:30.5 -10:01:16  8.5  0.40 159
PPM 237573     20:34:07.5 -10:15:37  9.6  0.12 159
576162         20:33:58.8 -10:08:44 16.8       159
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 576162, (2029/04/23 18:06UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 39.00 154
Tarazed        19:46:15.6 +10:36:48  2.7 23.80 142
PPM 204158     20:32:24.2 -09:51:10  5.6  0.39 159
PPM 237599     20:33:54.9 -10:07:23  8.5  0.40 159
PPM 237573     20:32:31.8 -10:21:42  9.6  0.12 159
576162         20:32:23.1 -10:14:48 16.8       159
Positions are for J2000

Event circumstances last updated at 2022/12/12 04:32:27 UT

Marc W. Buie, Southwest Research Institute

RECON