RECON: TNO occultation with 328884

Event between (328884) 10LJ109 and star UC4-232-150974 with event index number of 155472

Geocentric closest approach at 2018/10/13 01:18:12 UTC

J2000 position of star is 18:10:38.2 -43:44:50
Equinox of date position of star is 18:11:56.2 -43:44:33
Stellar brightness R=15.2, use SENSEUP=128
Star is 34 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=21.7

TNO is 12.7 AU from the Sun and 13.0 AU from the Earth.
The TNO is moving 19.0 km/sec on the sky relative to the star, or, 7.3 arcsec/hr.
The 1-sigma error in the time of the event is 248 seconds.
The 1-sigma cross-track error in the shadow position is 2501 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.0 km assuming a 5% albedo -- 2.9 sec chord
Diameter=22.4 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 328884, (2018/10/13 01:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.7 -26:28:20  0.9 26.80   9
The Sco        17:38:40.2 -43:00:28  1.9  6.10  29
PPM 323736     18:08:11.4 -43:25:20  4.9  0.76  33
PPM 323841     18:13:43.1 -43:26:28  8.2  0.43  34
PPM 323809     18:12:03.6 -43:32:58  9.8  0.19  34
328884         18:11:59.9 -43:44:32 15.2        34
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, (2018/10/13 01:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 26.80   9
The Sco        17:37:19.2 -42:59:52  1.9  6.10  29
PPM 323736     18:06:49.9 -43:25:32  4.9  0.76  33
PPM 323841     18:12:21.6 -43:26:49  8.2  0.43  34
PPM 323809     18:10:42.0 -43:33:17  9.8  0.19  34
328884         18:10:38.2 -43:44:50 15.2        34
Positions are for J2000

Event circumstances last updated at 2017/12/05 18:59:35 UT

Marc W. Buie, Southwest Research Institute

RECON