RECON: TNO occultation with 13HU156

Event between 13HU156 and star GA0860:04837542 with event index number of 158348

Geocentric closest approach at 2018/09/14 20:56:34 UTC

J2000 position of star is 16:25:33.0 -03:07:48
Equinox of date position of star is 16:26:30.9 -03:10:16
Stellar brightness G=15.7, use SENSEUP=128
Star is 15 degrees from the moon. Moon is 30% illuminated.
TNO apparent brightness V=21.5

TNO is 38.3 AU from the Sun and 38.5 AU from the Earth.
The TNO is moving 15.9 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 214 seconds.
The 1-sigma cross-track error in the shadow position is 2008 km.

The TNO has an absolute magnitude Hv=5.5
Diameter=472.1 km assuming a 5% albedo -- 29.7 sec chord
Diameter=192.7 km assuming a 30% albedo -- 12.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 13HU156, (2018/09/14 20:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.4 -26:28:19  0.9 23.32  15
1Del Oph       16:15:19.7 -03:44:28  2.7  2.85  13
2Eps Oph       16:19:18.8 -04:44:12  3.2  2.39  13
PPM 199672     16:27:58.1 -03:01:59  8.1  0.39  16
PPM 199646     16:26:37.3 -02:59:04  9.8  0.19  15
13HU156        16:26:31.7 -03:10:18 15.7        15
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 13HU156, (2018/09/14 20:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.32  15
1Del Oph       16:14:20.7 -03:41:42  2.7  2.85  13
2Eps Oph       16:18:19.4 -04:41:32  3.2  2.39  13
PPM 199672     16:26:59.3 -02:59:31  8.1  0.39  16
PPM 199646     16:25:38.6 -02:56:34  9.8  0.19  15
13HU156        16:25:33.0 -03:07:48 15.7        15
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:26:26 UT

Marc W. Buie, Southwest Research Institute

RECON