RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0580:06783177 with event index number of 2281343

Geocentric closest approach at 2022/06/04 08:44:16 UTC

J2000 position of star is 13:24:14.8 -30:01:37
Equinox of date position of star is 13:25:29.8 -30:08:35
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 86 degrees from the moon. Moon is 20% illuminated.
TNO apparent brightness V=19.1

TNO is 8.5 AU from the Sun and 7.8 AU from the Earth.
The TNO is moving 13.7 km/sec on the sky relative to the star, or, 8.7 arcsec/hr.
The 1-sigma error in the time of the event is 25 seconds.
The 1-sigma cross-track error in the shadow position is 498 km.

The TNO has an absolute magnitude Hv=9.6
Diameter=70.8 km assuming a 5% albedo -- 5.2 sec chord
Diameter=28.9 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2022/06/04 08:44UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:22.7 -11:16:40  1.0 18.87  77
Iot Cen        13:21:51.9 -36:49:48  2.8  6.73  89
PPM 291197     13:18:08.3 -31:37:27  5.1  2.17  85
PPM 291248     13:20:31.4 -31:00:15  8.3  1.37  86
PPM 261590     13:24:12.6 -30:03:39  9.8  0.29  86
459865         13:25:30.0 -30:08:36 16.5        86
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, (2022/06/04 08:44UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 18.87  77
Iot Cen        13:20:35.2 -36:42:46  2.8  6.73  89
PPM 291197     13:16:53.2 -31:30:23  5.1  2.17  85
PPM 291248     13:19:16.4 -30:53:12  8.3  1.37  86
PPM 261590     13:22:57.4 -29:56:39  9.8  0.29  86
459865         13:24:14.8 -30:01:37 16.5        86
Positions are for J2000

Event circumstances last updated at 2022/05/14 23:45:45 UT

Marc W. Buie, Southwest Research Institute

RECON