RECON: TNO occultation with 136120

Event between (136120) 03LG7 and star UC4-382-094177 with event index number of 109361

Geocentric closest approach at 2018/03/07 01:08:53 UTC

J2000 position of star is 17:51:50.6 -13:41:59
Equinox of date position of star is 17:52:49.7 -13:42:11
Stellar brightness R=16.0, use SENSEUP=128
Star is 39 degrees from the moon. Moon is 73% illuminated.
TNO apparent brightness V=23.7

TNO is 36.2 AU from the Sun and 36.4 AU from the Earth.
The TNO is moving 13.7 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 658 seconds.
The 1-sigma cross-track error in the shadow position is 4311 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=158.5 km assuming a 5% albedo -- 11.6 sec chord
Diameter=64.7 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is 3:1EE
 
 
 
 
 
 
 
 

Star training set for 136120, (2018/03/07 01:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.5 -26:28:15  0.9 23.11  23
35Eta Oph      17:11:25.3 -15:44:46  2.6 10.23  29
PPM 233599     17:48:39.0 -14:43:52  5.9  1.45  38
PPM 233706     17:54:06.8 -13:39:12  7.4  0.31  39
PPM 233678     17:52:42.6 -13:46:56  9.8  0.09  39
136120         17:52:52.4 -13:42:11 16.0        39
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, (2018/03/07 01:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.11  23
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.23  29
PPM 233599     17:47:36.8 -14:43:33  5.9  1.45  38
PPM 233706     17:53:05.0 -13:39:02  7.4  0.31  39
PPM 233678     17:51:40.7 -13:46:44  9.8  0.09  39
136120         17:51:50.6 -13:41:59 16.0        39
Positions are for J2000

Event circumstances last updated at 2017/05/17 18:03:15 UT

Marc W. Buie, Southwest Research Institute

RECON