RECON: TNO occultation with 533561

Event between (533561) 14JN80 and star GA0820:05911153 with event index number of 1610011

Geocentric closest approach at 2021/07/03 18:23:27 UTC

J2000 position of star is 17:22:17.3 -07:35:31
Equinox of date position of star is 17:23:25.8 -07:36:40
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 132 degrees from the moon. Moon is 32% illuminated.
TNO apparent brightness V=22.4

TNO is 37.7 AU from the Sun and 36.8 AU from the Earth.
The TNO is moving 22.6 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 181 seconds.
The 1-sigma cross-track error in the shadow position is 1966 km.

The TNO has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 12.8 sec chord
Diameter=117.7 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 533561, (2021/07/03 18:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.8 -26:28:40  0.9 22.65 142
35Eta Oph      17:11:36.8 -15:45:00  2.6  8.64 135
PPM 200559     17:21:08.7 -05:56:21  6.5  1.77 132
PPM 200608     17:24:14.2 -07:07:26  7.1  0.52 132
PPM 200595     17:23:42.4 -07:50:54  9.5  0.25 132
533561         17:23:27.2 -07:36:41 16.1       132
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 533561, (2021/07/03 18:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.65 142
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.64 135
PPM 200559     17:19:59.6 -05:55:07  6.5  1.77 132
PPM 200608     17:23:04.5 -07:06:18  7.1  0.52 132
PPM 200595     17:22:32.4 -07:49:45  9.5  0.25 132
533561         17:22:17.3 -07:35:31 16.1       132
Positions are for J2000

Event circumstances last updated at 2021/01/23 20:21:12 UT

Marc W. Buie, Southwest Research Institute

RECON