RECON: TNO occultation with 10KZ39

Event between 10KZ39 and star GA0520:17401756 with event index number of 2821686

Geocentric closest approach at 2023/07/24 01:42:38 UTC

J2000 position of star is 17:18:00.1 -36:42:41
Equinox of date position of star is 17:19:31.0 -36:44:02
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 72 degrees from the moon. Moon is 32% illuminated.
TNO apparent brightness V=20.7

TNO is 45.8 AU from the Sun and 45.0 AU from the Earth.
The TNO is moving 18.8 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 486 seconds.
The 1-sigma cross-track error in the shadow position is 5013 km.

The TNO has an absolute magnitude Hv=4.0
Diameter=959.4 km assuming a 5% albedo -- 51.1 sec chord
Diameter=391.7 km assuming a 30% albedo -- 20.9 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 10KZ39, (2023/07/24 01:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.3 -26:28:56  0.9 14.56  60
34Ups Sco      17:32:22.1 -37:18:44  2.7  2.61  75
PPM 296118     17:17:56.1 -35:46:37  6.0  1.01  72
PPM 296177     17:20:13.4 -36:06:37  8.2  0.64  72
PPM 296149     17:19:06.9 -36:46:01  9.9  0.10  72
10KZ39         17:19:35.7 -36:44:06 16.8        73
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 10KZ39, (2023/07/24 01:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.56  60
34Ups Sco      17:30:45.8 -37:17:46  2.7  2.61  75
PPM 296118     17:16:21.4 -35:45:09  6.0  1.01  72
PPM 296177     17:18:38.3 -36:05:13  8.2  0.64  72
PPM 296149     17:17:31.4 -36:44:36  9.9  0.10  72
10KZ39         17:18:00.1 -36:42:41 16.8        72
Positions are for J2000

Event circumstances last updated at 2022/06/01 23:23:09 UT

Marc W. Buie, Southwest Research Institute

RECON