RECON: TNO occultation with 05GF187

Event between 05GF187 and star UC4-354-080306 with event index number of 195542

Geocentric closest approach at 2019/07/04 01:56:20 UTC

J2000 position of star is 16:51:22.5 -19:12:40
Equinox of date position of star is 16:52:24.5 -19:14:23
Stellar brightness R=14.8, use SENSEUP=128
Star is 135 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=22.6

TNO is 29.5 AU from the Sun and 28.6 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 311 seconds.
The 1-sigma cross-track error in the shadow position is 2520 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=157.8 km assuming a 5% albedo -- 8.0 sec chord
Diameter=64.4 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 05GF187, (2019/07/04 01:56UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.4 -26:28:25  0.9  8.82 131
35Eta Oph      17:11:29.9 -15:44:52  2.6  5.72 138
PPM 266088     16:54:34.5 -20:26:48  5.7  1.30 135
PPM 232233     16:52:18.9 -19:13:07  8.0  0.05 134
05GF187        16:52:31.2 -19:14:34 14.8       135
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 05GF187, (2019/07/04 01:56UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  8.82 131
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.72 138
PPM 266088     16:53:25.2 -20:24:57  5.7  1.30 135
PPM 232233     16:51:10.3 -19:11:12  8.0  0.05 134
05GF187        16:51:22.5 -19:12:40 14.8       134
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:08:36 UT

Marc W. Buie, Southwest Research Institute

RECON