RECON: TNO occultation with 136120

Event between (136120) 03LG7 and star GA0760:09367609 with event index number of 127544

Geocentric closest approach at 2018/07/09 19:58:58 UTC

J2000 position of star is 17:45:46.3 -13:09:26
Equinox of date position of star is 17:46:48.7 -13:09:48
Stellar brightness G=14.0, use SENSEUP=64
Star is 155 degrees from the moon. Moon is 15% illuminated.
TNO apparent brightness V=23.5

TNO is 36.3 AU from the Sun and 35.4 AU from the Earth.
The TNO is moving 21.9 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 505 seconds.
The 1-sigma cross-track error in the shadow position is 4066 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=158.5 km assuming a 5% albedo -- 7.2 sec chord
Diameter=64.7 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is 3:1EE
 
 
 
 
 
 
 
 

Star training set for 136120, (2018/07/09 19:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.8 -26:28:18  0.9 22.28 168
35Eta Oph      17:11:26.5 -15:44:48  2.6  8.94 164
56Omi Ser      17:42:27.4 -12:53:01  4.4  1.10 156
PPM 233521     17:44:51.2 -13:30:59  6.7  0.59 155
PPM 233569     17:47:08.3 -13:06:35  9.9  0.10 155
136120         17:46:49.0 -13:09:48 14.0       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 136120, (2018/07/09 19:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.28 168
35Eta Oph      17:10:22.7 -15:43:29  2.6  8.94 164
56Omi Ser      17:41:24.8 -12:52:32  4.4  1.10 156
PPM 233521     17:43:48.3 -13:30:33  6.7  0.59 155
PPM 233569     17:46:05.6 -13:06:13  9.9  0.10 155
136120         17:45:46.3 -13:09:26 14.0       155
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:13:52 UT

Marc W. Buie, Southwest Research Institute

RECON