RECON: TNO occultation with 533398

Event between (533398) 14GA54 and star GA0800:05676860 with event index number of 1607309

Geocentric closest approach at 2020/06/18 11:46:55 UTC

J2000 position of star is 17:02:47.7 -09:40:25
Equinox of date position of star is 17:03:52.0 -09:42:00
Stellar brightness G=15.7, use SENSEUP=128
Star is 158 degrees from the moon. Moon is 8% illuminated.
TNO apparent brightness V=22.2

TNO is 31.5 AU from the Sun and 30.5 AU from the Earth.
The TNO is moving 23.0 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 102 seconds.
The 1-sigma cross-track error in the shadow position is 1250 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=218.8 km assuming a 5% albedo -- 9.5 sec chord
Diameter=89.3 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is 8:5EEE
 
 
 
 
 
 
 
 

Star training set for 533398, (2020/06/18 11:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.9 -26:28:32  0.9 18.53 164
35Eta Oph      17:11:33.2 -15:44:56  2.6  6.33 157
PPM 232375     16:58:34.1 -10:59:40  6.3  1.84 159
PPM 200352     17:08:12.5 -09:49:03  8.5  1.06 157
PPM 200299     17:04:57.4 -09:34:40  9.6  0.28 157
533398         17:03:55.1 -09:42:05 15.7       157
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, (2020/06/18 11:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.53 164
35Eta Oph      17:10:22.7 -15:43:29  2.6  6.33 157
PPM 232375     16:57:26.0 -10:57:50  6.3  1.84 159
PPM 200352     17:07:04.9 -09:47:30  8.5  1.06 157
PPM 200299     17:03:50.0 -09:33:02  9.6  0.28 157
533398         17:02:47.7 -09:40:25 15.7       158
Positions are for J2000

Event circumstances last updated at 2019/07/02 02:42:26 UT

Marc W. Buie, Southwest Research Institute

RECON