RECON: TNO occultation with 500882

Event between (500882) 13JN64 and star UC4-378-078617 with event index number of 221139

Geocentric closest approach at 2018/06/10 00:43:35 UTC

J2000 position of star is 16:40:45.2 -14:25:19
Equinox of date position of star is 16:41:46.1 -14:27:20
Stellar brightness R=13.0, use SENSEUP=32
Star is 138 degrees from the moon. Moon is 19% illuminated.
TNO apparent brightness V=24.2

TNO is 38.6 AU from the Sun and 37.6 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 178 seconds.
The 1-sigma cross-track error in the shadow position is 1817 km.

The TNO has an absolute magnitude Hv=8.3
Diameter=131.8 km assuming a 5% albedo -- 5.6 sec chord
Diameter=53.8 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 7:3EEEE
 
 
 
 
 
 
 
 

Star training set for 500882, (2018/06/10 00:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.5 -26:28:17  0.9 12.30 137
13Zet Oph      16:38:10.6 -10:36:11  2.6  3.95 139
PPM 232182     16:49:29.9 -14:56:27  6.2  1.92 136
PPM 232068     16:44:21.2 -14:04:06  8.2  0.73 137
PPM 232028     16:42:36.8 -14:28:22  9.2  0.20 137
500882         16:41:47.9 -14:27:23 13.0       137
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 500882, (2018/06/10 00:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.30 137
13Zet Oph      16:37:09.6 -10:34:01  2.6  3.95 139
PPM 232182     16:48:27.0 -14:54:34  6.2  1.92 136
PPM 232068     16:43:18.7 -14:02:06  8.2  0.73 137
PPM 232028     16:41:34.1 -14:26:18  9.2  0.20 137
500882         16:40:45.2 -14:25:19 13.0       138
Positions are for J2000

Event circumstances last updated at 2017/12/04 18:43:43 UT

Marc W. Buie, Southwest Research Institute

RECON