RECON: TNO occultation with 328884

Event between (328884) 10LJ109 and star GA0440:28794819 with event index number of 118793

Geocentric closest approach at 2018/06/08 17:34:13 UTC

J2000 position of star is 18:28:10.3 -45:00:53
Equinox of date position of star is 18:29:31.4 -45:00:06
Stellar brightness G=15.5, use SENSEUP=128
Star is 93 degrees from the moon. Moon is 31% illuminated.
TNO apparent brightness V=21.2

TNO is 12.5 AU from the Sun and 11.6 AU from the Earth.
The TNO is moving 20.7 km/sec on the sky relative to the star, or, 8.8 arcsec/hr.
The 1-sigma error in the time of the event is 322 seconds.
The 1-sigma cross-track error in the shadow position is 2617 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.0 km assuming a 5% albedo -- 2.7 sec chord
Diameter=22.4 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 328884, (2018/06/08 17:34UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.4 -26:28:17  0.9 30.15 120
The Sco        17:38:38.7 -43:00:28  1.9  9.35 103
Alp Tel        18:28:20.4 -45:57:23  3.5  0.98  93
PPM 324066     18:26:38.4 -44:34:52  8.0  0.66  94
PPM 324119     18:29:40.5 -44:48:13  9.2  0.20  93
328884         18:29:31.5 -45:00:06 15.5        93
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 328884, (2018/06/08 17:34UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.15 120
The Sco        17:37:19.2 -42:59:52  1.9  9.35 103
Alp Tel        18:26:58.4 -45:58:07  3.5  0.98  93
PPM 324066     18:25:17.6 -44:35:34  8.0  0.66  94
PPM 324119     18:28:19.6 -44:48:59  9.2  0.20  93
328884         18:28:10.3 -45:00:53 15.5        93
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:06:39 UT

Marc W. Buie, Southwest Research Institute

RECON