RECON: TNO occultation with 328884

Event between (328884) 10LJ109 and star UC4-233-160987 with event index number of 155510

Geocentric closest approach at 2018/10/28 11:37:48 UTC

J2000 position of star is 18:15:05.4 -43:27:00
Equinox of date position of star is 18:16:18.4 -43:26:37
Stellar brightness R=16.1
Star is 155 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=21.7

TNO is 12.7 AU from the Sun and 13.2 AU from the Earth.
The TNO is moving 25.0 km/sec on the sky relative to the star, or, 9.4 arcsec/hr.
The 1-sigma error in the time of the event is 126 seconds.
The 1-sigma cross-track error in the shadow position is 1289 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.0 km assuming a 5% albedo -- 2.2 sec chord
Diameter=22.4 km assuming a 30% albedo -- 0.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 328884, (2018/10/28 11:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.9 -26:28:20  0.9 27.34 165
The Sco        17:38:40.4 -43:00:28  1.9  6.89 157
PPM 323894     18:17:15.8 -44:11:55  5.4  0.77 154
PPM 323893     18:17:11.8 -43:09:40  7.4  0.31 155
PPM 323901     18:17:28.7 -43:15:37  9.0  0.26 155
328884         18:16:27.0 -43:26:34 16.1       155
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, (2018/10/28 11:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 27.34 165
The Sco        17:37:19.2 -42:59:52  1.9  6.89 157
PPM 323894     18:15:53.6 -44:12:23  5.4  0.77 154
PPM 323893     18:15:50.4 -43:10:08  7.4  0.31 155
PPM 323901     18:16:07.2 -43:16:05  9.0  0.26 155
328884         18:15:05.4 -43:27:00 16.1       155
Positions are for J2000

Event circumstances last updated at 2016/11/02 18:01:54 UT

Marc W. Buie, Southwest Research Institute

RECON