RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0620:07681559 with event index number of 2281953

Geocentric closest approach at 2024/08/15 10:44:21 UTC

J2000 position of star is 15:56:00.3 -27:57:29
Equinox of date position of star is 15:57:30.4 -28:01:40
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 23 degrees from the moon. Moon is 77% illuminated.
Apparent brightness V=19.6

Object is 9.4 AU from the Sun and 9.2 AU from the Earth.
Apparent velocity is 9.3 km/sec on the sky relative to the star, or, 5.0 arcsec/hr.
The 1-sigma error in the time of the event is 45 seconds.
The 1-sigma cross-track error in the shadow position is 428 km.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 8.1 sec chord
Diameter=28.9 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2024/08/15 10:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:55.3 -26:29:04  0.9  7.58  16
7Del Sco       16:01:47.6 -22:41:23  2.3  5.43  24
PPM 264761     15:52:04.2 -26:21:46  6.5  2.06  25
PPM 264870     15:57:15.9 -28:25:51  8.5  0.41  23
PPM 264872     15:57:18.8 -28:01:21  8.8  0.05  23
459865         15:57:31.1 -28:01:42 16.2        23
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, (2024/08/15 10:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.58  16
7Del Sco       16:00:20.0 -22:37:19  2.3  5.43  24
PPM 264761     15:50:34.7 -26:17:23  6.5  2.06  25
PPM 264870     15:55:45.0 -28:21:38  8.5  0.41  23
PPM 264872     15:55:48.1 -27:57:07  8.8  0.05  23
459865         15:56:00.3 -27:57:29 16.2        23
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:49:58 UT

Marc W. Buie, Southwest Research Institute

RECON