RECON: TNO occultation with 543454

Event between (543454) 14HZ199 and star GA0760:05129893 with event index number of 1705124

Geocentric closest approach at 2021/08/20 18:29:50 UTC

J2000 position of star is 15:04:10.8 -12:42:27
Equinox of date position of star is 15:05:20.2 -12:47:19
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 79 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=21.5

TNO is 41.7 AU from the Sun and 41.9 AU from the Earth.
The TNO is moving 10.7 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 152 seconds.
The 1-sigma cross-track error in the shadow position is 1630 km.

The TNO has an absolute magnitude Hv=5.1
Diameter=586.2 km assuming a 5% albedo -- 54.6 sec chord
Diameter=239.3 km assuming a 30% albedo -- 22.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 543454, (2021/08/20 18:30UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:20.2 -11:16:25  1.0 24.25 102
27Bet Lib      15:18:10.5 -09:27:41  2.6  4.58  77
18 Lib         15:00:04.0 -11:13:47  5.8  2.03  81
PPM 229687     15:04:19.4 -12:56:29  8.1  0.30  79
PPM 229722     15:06:01.6 -12:52:29  9.5  0.18  79
543454         15:05:22.1 -12:47:27 15.9        79
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 543454, (2021/08/20 18:30UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 24.25 102
27Bet Lib      15:17:00.3 -09:22:59  2.6  4.58  77
18 Lib         14:58:53.4 -11:08:40  5.8  2.03  81
PPM 229687     15:03:08.1 -12:51:28  8.1  0.30  79
PPM 229722     15:04:50.3 -12:47:30  9.5  0.18  79
543454         15:04:10.8 -12:42:27 15.9        79
Positions are for J2000

Event circumstances last updated at 2021/01/24 21:03:34 UT

Marc W. Buie, Southwest Research Institute

RECON