RECON: TNO occultation with 05GF187

Event between 05GF187 and star UC4-353-085295 with event index number of 195512

Geocentric closest approach at 2019/04/07 19:22:16 UTC

J2000 position of star is 16:59:41.1 -19:26:46
Equinox of date position of star is 17:00:44.4 -19:28:19
Stellar brightness R=15.5, use SENSEUP=128
Star is 150 degrees from the moon. Moon is 6% illuminated.
TNO apparent brightness V=22.7

TNO is 29.5 AU from the Sun and 29.0 AU from the Earth.
The TNO is moving 9.1 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 868 seconds.
The 1-sigma cross-track error in the shadow position is 3298 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=157.8 km assuming a 5% albedo -- 17.3 sec chord
Diameter=64.4 km assuming a 30% albedo -- 7.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 05GF187, (2019/04/07 19:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.5 -26:28:23  0.9  9.86 155
35Eta Oph      17:11:29.1 -15:44:51  2.6  4.51 148
PPM 232367     16:58:11.9 -19:34:09  6.1  0.62 151
PPM 232457     17:01:26.8 -19:11:45  8.3  0.32 150
PPM 232421     17:00:02.2 -19:38:17  9.7  0.25 150
05GF187        17:00:49.2 -19:28:26 15.5       150
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, (2019/04/07 19:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.86 155
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.51 148
PPM 232367     16:57:03.9 -19:32:25  6.1  0.62 151
PPM 232457     17:00:18.9 -19:10:06  8.3  0.32 150
PPM 232421     16:58:54.1 -19:36:36  9.7  0.25 150
05GF187        16:59:41.1 -19:26:46 15.5       150
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:50:21 UT

Marc W. Buie, Southwest Research Institute

RECON