RECON: TNO occultation with 533559

Event between (533559) 14JG80 and star GA0780:05804318 with event index number of 2587285

Geocentric closest approach at 2023/07/15 16:46:48 UTC

J2000 position of star is 17:03:53.4 -11:32:53
Equinox of date position of star is 17:05:09.4 -11:34:42
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 159 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=22.3

TNO is 27.0 AU from the Sun and 26.2 AU from the Earth.
The TNO is moving 20.2 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 71 seconds.
The 1-sigma cross-track error in the shadow position is 1239 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=157.8 km assuming a 5% albedo -- 7.9 sec chord
Diameter=64.4 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 533559, (2023/07/15 16:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.3 -26:28:56  0.9 16.95 160
35Eta Oph      17:11:43.8 -15:45:09  2.6  4.46 164
PPM 232375     16:58:44.3 -10:59:56  6.3  1.69 158
PPM 232569     17:05:51.7 -11:07:11  7.0  0.49 159
PPM 232553     17:05:26.3 -11:21:01  9.5  0.24 159
533559         17:05:12.0 -11:34:46 15.9       160
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, (2023/07/15 16:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.95 160
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.46 164
PPM 232375     16:57:26.0 -10:57:50  6.3  1.69 158
PPM 232569     17:04:33.3 -11:05:19  7.0  0.49 159
PPM 232553     17:04:07.8 -11:19:09  9.5  0.24 159
533559         17:03:53.4 -11:32:53 15.9       159
Positions are for J2000

Event circumstances last updated at 2022/10/05 04:16:44 UT

Marc W. Buie, Southwest Research Institute

RECON