RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0600:06365378 with event index number of 1056961

Geocentric closest approach at 2021/02/13 01:31:57 UTC

J2000 position of star is 12:27:38.4 -28:39:21
Equinox of date position of star is 12:28:45.0 -28:46:20
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 133 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=19.2

TNO is 8.4 AU from the Sun and 7.9 AU from the Earth.
The TNO is moving 9.8 km/sec on the sky relative to the star, or, 6.2 arcsec/hr.
The 1-sigma error in the time of the event is 60 seconds.
The 1-sigma cross-track error in the shadow position is 438 km.

The TNO has an absolute magnitude Hv=9.7
Diameter=69.5 km assuming a 5% albedo -- 7.1 sec chord
Diameter=28.4 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2021/02/13 01:32UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:18.5 -11:16:15  1.0 22.07 135
9Bet Crv       12:35:30.0 -23:30:48  2.6  5.47 136
PPM 260319     12:26:25.1 -27:51:57  6.1  1.04 134
PPM 260358     12:28:33.1 -28:49:59  7.8  0.07 133
459865         12:28:45.2 -28:46:21 14.6       133
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 459865, (2021/02/13 01:32UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 22.07 135
9Bet Crv       12:34:23.2 -23:23:49  2.6  5.47 136
PPM 260319     12:25:18.4 -27:44:57  6.1  1.04 134
PPM 260358     12:27:26.3 -28:42:58  7.8  0.07 133
459865         12:27:38.4 -28:39:21 14.6       133
Positions are for J2000

Event circumstances last updated at 2021/01/22 20:43:23 UT

Marc W. Buie, Southwest Research Institute

RECON