RECON: TNO occultation with 14GQ53

Event between 14GQ53 and star UC4-452-058531 with event index number of 207135

Geocentric closest approach at 2018/08/31 12:49:55 UTC

J2000 position of star is 16:07:59.4 +00:21:03
Equinox of date position of star is 16:08:53.4 +00:18:18
Stellar brightness R=15.6, use SENSEUP=128
Star is 152 degrees from the moon. Moon is 76% illuminated.
TNO apparent brightness V=22.5

TNO is 19.2 AU from the Sun and 19.3 AU from the Earth.
The TNO is moving 16.5 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 214 seconds.
The 1-sigma cross-track error in the shadow position is 4282 km.

The TNO has an absolute magnitude Hv=9.4
Diameter=81.3 km assuming a 5% albedo -- 4.9 sec chord
Diameter=33.2 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 14GQ53, (2018/08/31 12:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.3 -26:28:19  0.9 27.28 145
1Del Oph       16:15:19.5 -03:44:28  2.7  4.35 152
PPM 199363     16:10:49.2 -03:30:53  5.0  3.85 153
PPM 162291     16:10:38.5 +00:46:18  8.2  0.63 152
PPM 162273     16:09:28.7 +00:32:34  9.4  0.28 152
14GQ53         16:08:56.7 +00:18:08 15.6       152
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 14GQ53, (2018/08/31 12:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 27.28 145
1Del Oph       16:14:20.7 -03:41:42  2.7  4.35 152
PPM 199363     16:09:50.5 -03:28:00  5.0  3.85 153
PPM 162291     16:09:41.4 +00:49:11  8.2  0.63 152
PPM 162273     16:08:31.5 +00:35:29  9.4  0.28 152
14GQ53         16:07:59.4 +00:21:03 15.6       152
Positions are for J2000

Event circumstances last updated at 2017/08/02 16:56:20 UT

Marc W. Buie, Southwest Research Institute

RECON