RECON: TNO occultation with 533398

Event between (533398) 14GA54 and star GA0780:06056734 with event index number of 1607366

Geocentric closest approach at 2021/05/19 15:37:59 UTC

J2000 position of star is 17:15:02.0 -10:19:29
Equinox of date position of star is 17:16:11.8 -10:20:51
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 110 degrees from the moon. Moon is 49% illuminated.
TNO apparent brightness V=22.2

TNO is 31.4 AU from the Sun and 30.5 AU from the Earth.
The TNO is moving 21.7 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 83 seconds.
The 1-sigma cross-track error in the shadow position is 1217 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=215.8 km assuming a 5% albedo -- 9.9 sec chord
Diameter=88.1 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is REMOVED
 
 
 
 
 
 
 
 

Star training set for 533398, (2021/05/19 15:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.3 -26:28:39  0.9 19.38 103
35Eta Oph      17:11:36.4 -15:45:00  2.6  5.52 110
PPM 232685     17:10:59.0 -10:32:58  5.6  1.30 109
PPM 232833     17:16:45.5 -10:19:12  7.5  0.14 110
533398         17:16:12.9 -10:20:52 16.6       110
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 533398, (2021/05/19 15:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.38 103
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.52 110
PPM 232685     17:09:48.0 -10:31:26  5.6  1.30 109
PPM 232833     17:15:34.6 -10:17:51  7.5  0.14 110
533398         17:15:02.0 -10:19:29 16.6       110
Positions are for J2000

Event circumstances last updated at 2021/01/21 21:02:28 UT

Marc W. Buie, Southwest Research Institute

RECON