RECON: TNO occultation with 119315

Event between (119315) 01SQ73 and star GA1260:03293545 with event index number of 2111631

Geocentric closest approach at 2022/10/10 13:17:41 UTC

J2000 position of star is 08:23:42.1 +36:51:22
Equinox of date position of star is 08:25:10.4 +36:46:53
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 94 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=22.8

TNO is 20.1 AU from the Sun and 20.3 AU from the Earth.
The TNO is moving 14.5 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 196 seconds.
The 1-sigma cross-track error in the shadow position is 1421 km.

The TNO has an absolute magnitude Hv=9.5
Diameter=72.4 km assuming a 5% albedo -- 5.2 sec chord
Diameter=29.6 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 119315, (2022/10/10 13:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:42.4 +27:58:10  1.1 11.97  88
PPM 073770     08:32:48.2 +37:11:11  6.0  1.58  95
PPM 073689     08:26:52.3 +37:18:45  8.1  0.63  94
PPM 073697     08:27:30.8 +36:54:24  8.8  0.48  94
PPM 073661     08:24:56.2 +36:38:56 11.2  0.14  94
119315         08:25:10.5 +36:46:53 15.9        94
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 119315, (2022/10/10 13:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 11.97  88
PPM 073770     08:31:20.0 +37:15:52  6.0  1.58  95
PPM 073689     08:25:23.6 +37:23:17  8.1  0.63  94
PPM 073697     08:26:02.4 +36:58:57  8.8  0.48  94
PPM 073661     08:23:27.8 +36:43:25 11.2  0.14  94
119315         08:23:42.1 +36:51:22 15.9        94
Positions are for J2000

Event circumstances last updated at 2022/09/30 04:12:54 UT

Marc W. Buie, Southwest Research Institute

RECON