RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0580:08714195 with event index number of 2281901

Geocentric closest approach at 2024/06/03 23:25:21 UTC

J2000 position of star is 16:06:01.2 -30:15:26
Equinox of date position of star is 16:07:32.6 -30:19:17
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 154 degrees from the moon. Moon is 8% illuminated.
Apparent brightness V=19.1

Object is 9.3 AU from the Sun and 8.3 AU from the Earth.
Apparent velocity is 19.5 km/sec on the sky relative to the star, or, 11.6 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 361 km.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 3.9 sec chord
Diameter=28.9 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2024/06/03 23:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.5 -26:29:03  0.9  6.41 151
23Tau Sco      16:37:24.4 -28:15:52  2.8  6.83 149
PPM 265228     16:12:33.4 -29:28:43  5.2  1.37 154
PPM 294590     16:04:34.4 -30:19:46  8.3  0.64 155
PPM 294677     16:08:51.2 -30:28:49  9.6  0.32 154
459865         16:07:33.0 -30:19:18 16.7       154
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, (2024/06/03 23:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  6.41 151
23Tau Sco      16:35:52.9 -28:12:58  2.8  6.83 149
PPM 265228     16:11:01.9 -29:25:00  5.2  1.37 154
PPM 294590     16:03:02.7 -30:15:48  8.3  0.64 155
PPM 294677     16:07:19.2 -30:24:59  9.6  0.32 154
459865         16:06:01.2 -30:15:26 16.7       154
Positions are for J2000

Event circumstances last updated at 2024/04/22 03:55:08 UT

Marc W. Buie, Southwest Research Institute

RECON