RECON: TNO occultation with 14GR53

Event between 14GR53 and star UC4-358-073508 with event index number of 193194

Geocentric closest approach at 2018/04/14 01:29:12 UTC

J2000 position of star is 15:25:07.5 -18:29:19
Equinox of date position of star is 15:26:08.8 -18:33:03
Stellar brightness R=15.0, use SENSEUP=128
Star is 125 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=21.8

TNO is 22.6 AU from the Sun and 21.8 AU from the Earth.
The TNO is moving 20.0 km/sec on the sky relative to the star, or, 4.6 arcsec/hr.
The 1-sigma error in the time of the event is 47 seconds.
The 1-sigma cross-track error in the shadow position is 1468 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 6.9 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 
 
 

Star training set for 14GR53, (2018/04/14 01:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.9 -26:28:16  0.9 16.82 109
7Del Sco       16:01:25.1 -22:40:20  2.3  9.22 116
28 Lib         15:21:56.1 -18:13:25  6.4  1.06 126
PPM 230293     15:29:46.0 -18:47:09  8.3  0.88 124
PPM 230208     15:25:52.7 -18:26:29  8.9  0.13 125
14GR53         15:26:10.1 -18:33:08 15.0       125
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 14GR53, (2018/04/14 01:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.82 109
7Del Sco       16:00:20.0 -22:37:18  2.3  9.22 116
28 Lib         15:20:53.7 -18:09:32  6.4  1.06 126
PPM 230293     15:28:43.2 -18:43:25  8.3  0.88 124
PPM 230208     15:24:50.2 -18:22:40  8.9  0.13 125
14GR53         15:25:07.5 -18:29:19 15.0       125
Positions are for J2000

Event circumstances last updated at 2017/12/02 17:26:11 UT

Marc W. Buie, Southwest Research Institute

RECON