RECON: TNO occultation with 14DP143

Event between 14DP143 and star UC4-416-059564 with event index number of 193103

Geocentric closest approach at 2018/07/27 20:04:30 UTC

J2000 position of star is 14:25:31.0 -06:49:16
Equinox of date position of star is 14:26:26.3 -06:53:57
Stellar brightness R=16.5, use SENSEUP=128
Star is 88 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.4

TNO is 29.6 AU from the Sun and 29.5 AU from the Earth.
The TNO is moving 5.0 km/sec on the sky relative to the star, or, 0.8 arcsec/hr.
The 1-sigma error in the time of the event is 1301 seconds.
The 1-sigma cross-track error in the shadow position is 4723 km.

The TNO has an absolute magnitude Hv=7.5
Diameter=193.2 km assuming a 5% albedo -- 38.5 sec chord
Diameter=78.9 km assuming a 30% albedo -- 15.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 14DP143, (2018/07/27 20:05UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:10.4 -11:15:28  1.0 15.51 101
27Bet Lib      15:18:00.5 -09:27:01  2.6 13.00  75
99Iot Vir      14:16:59.5 -06:05:18  4.1  2.50  91
PPM 197518     14:25:45.1 -07:15:10  8.4  0.39  88
PPM 197516     14:25:40.2 -06:53:42  9.6  0.21  88
14DP143        14:26:29.9 -06:54:15 16.5        88
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 14DP143, (2018/07/27 20:05UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 15.51 101
27Bet Lib      15:17:00.3 -09:22:59  2.6 13.00  75
99Iot Vir      14:16:00.9 -06:00:10  4.1  2.50  91
PPM 197518     14:24:46.1 -07:10:10  8.4  0.39  88
PPM 197516     14:24:41.3 -06:48:42  9.6  0.21  88
14DP143        14:25:31.0 -06:49:16 16.5        88
Positions are for J2000

Event circumstances last updated at 2017/06/14 17:01:49 UT

Marc W. Buie, Southwest Research Institute

RECON