RECON: TNO occultation with 535169

Event between (535169) 14XX40 and star GA0800:04190758 with event index number of 2259410

Geocentric closest approach at 2023/01/24 00:59:17 UTC

J2000 position of star is 12:08:17.8 -08:07:53
Equinox of date position of star is 12:09:28.8 -08:15:34
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 148 degrees from the moon. Moon is 7% illuminated.
Apparent brightness V=22.6

Object is 32.6 AU from the Sun and 32.1 AU from the Earth.
Apparent velocity is 8.1 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 544 seconds.
The 1-sigma cross-track error in the shadow position is 1292 km.

The object has an absolute magnitude Hv=7.3
Diameter=204.2 km assuming a 5% albedo -- 25.2 sec chord
Diameter=83.4 km assuming a 30% albedo -- 10.3 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 
 
 

Star training set for 535169, (2023/01/24 00:59UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:24.7 -11:16:52  1.0 19.19 130
4Gam Crv       12:16:59.8 -17:40:12  2.6  9.59 139
PPM 195089     12:04:02.6 -07:48:43  5.8  1.42 149
PPM 195168     12:08:58.0 -08:36:52  7.8  0.38 147
PPM 195186     12:09:49.3 -08:14:48  9.2  0.09 147
535169         12:09:28.9 -08:15:35 16.9       147
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 535169, (2023/01/24 00:59UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 19.19 130
4Gam Crv       12:15:48.1 -17:32:30  2.6  9.59 139
PPM 195089     12:02:51.6 -07:41:01  5.8  1.42 149
PPM 195168     12:07:46.9 -08:29:10  7.8  0.38 147
PPM 195186     12:08:38.2 -08:07:06  9.2  0.09 147
535169         12:08:17.8 -08:07:53 16.9       148
Positions are for J2000

Event circumstances last updated at 2023/01/09 03:27:59 UT

Marc W. Buie, Southwest Research Institute

RECON