RECON: TNO occultation with 14GU53

Event between 14GU53 and star UC4-454-058327 with event index number of 135575

Geocentric closest approach at 2018/07/31 12:21:24 UTC

J2000 position of star is 16:02:46.3 +00:47:33
Equinox of date position of star is 16:03:40.1 +00:44:41
Stellar brightness R=15.2, use SENSEUP=128
Star is 110 degrees from the moon. Moon is 88% illuminated.
TNO apparent brightness V=21.8

TNO is 38.4 AU from the Sun and 38.1 AU from the Earth.
The TNO is moving 10.2 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 397 seconds.
The 1-sigma cross-track error in the shadow position is 5228 km.

The TNO has an absolute magnitude Hv=5.8
Diameter=413.1 km assuming a 5% albedo -- 40.3 sec chord
Diameter=168.6 km assuming a 30% albedo -- 16.5 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 14GU53, (2018/07/31 12:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.0 -26:28:18  0.9 27.97  98
1Del Oph       16:15:19.3 -03:44:27  2.7  5.34 107
PPM 162147     16:01:46.6 +04:22:36  5.8  3.67 111
PPM 162211     16:05:26.5 +00:37:19  7.4  0.45 110
PPM 162168     16:03:07.6 +00:28:20 10.6  0.31 110
14GU53         16:03:43.2 +00:44:31 15.2       110
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 14GU53, (2018/07/31 12:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 27.97  98
1Del Oph       16:14:20.7 -03:41:42  2.7  5.34 107
PPM 162147     16:00:51.1 +04:25:40  5.8  3.67 111
PPM 162211     16:04:29.6 +00:40:18  7.4  0.45 110
PPM 162168     16:02:10.7 +00:31:22 10.6  0.31 110
14GU53         16:02:46.3 +00:47:33 15.2       110
Positions are for J2000

Event circumstances last updated at 2017/08/02 16:55:23 UT

Marc W. Buie, Southwest Research Institute

RECON