RECON: TNO occultation with 533559

Event between (533559) 14JG80 and star GA0720:11797725 with event index number of 2588422

Geocentric closest approach at 2027/06/28 18:08:12 UTC

J2000 position of star is 17:36:35.7 -16:49:01
Equinox of date position of star is 17:37:55.3 -16:49:46
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 120 degrees from the moon. Moon is 34% illuminated.
TNO apparent brightness V=22.1

TNO is 26.5 AU from the Sun and 25.5 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 116 seconds.
The 1-sigma cross-track error in the shadow position is 2093 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=157.8 km assuming a 5% albedo -- 6.5 sec chord
Diameter=64.4 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 533559, (2027/06/28 18:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.9 -26:29:26  0.9 18.31 136
35Eta Oph      17:11:57.4 -15:45:25  2.6  6.39 126
PPM 233351     17:39:10.9 -15:35:07  6.2  1.27 119
PPM 233310     17:37:49.6 -17:52:47  7.8  1.05 120
PPM 233341     17:38:50.1 -16:44:06  9.6  0.18 120
533559         17:38:11.3 -16:49:55 16.5       119
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 533559, (2027/06/28 18:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.31 136
35Eta Oph      17:10:22.7 -15:43:29  2.6  6.39 126
PPM 233351     17:37:36.2 -15:34:15  6.2  1.27 119
PPM 233310     17:36:13.2 -17:51:52  7.8  1.05 120
PPM 233341     17:37:14.6 -16:43:13  9.6  0.18 120
533559         17:36:35.7 -16:49:01 16.5       120
Positions are for J2000

Event circumstances last updated at 2022/11/21 03:01:54 UT

Marc W. Buie, Southwest Research Institute

RECON