RECON: TNO occultation with 14DC143

Event between 14DC143 and star GA0920:03980878 with event index number of 1095708

Geocentric closest approach at 2021/06/26 17:06:00 UTC

J2000 position of star is 14:58:41.4 +02:37:38
Equinox of date position of star is 14:59:45.3 +02:32:39
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 82 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=22.5

TNO is 15.8 AU from the Sun and 15.2 AU from the Earth.
The TNO is moving 13.0 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 96 seconds.
The 1-sigma cross-track error in the shadow position is 978 km.

The TNO has an absolute magnitude Hv=10.3
Diameter=52.7 km assuming a 5% albedo -- 4.1 sec chord
Diameter=21.5 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 14DC143, (2021/06/26 17:06UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:38.6 +19:04:18  0.0 19.61  99
Unukalhai      15:45:19.7 +06:21:34  2.6 11.98  74
110 Vir        15:03:59.3 +02:00:29  4.4  1.18  81
PPM 161109     14:57:36.0 +02:50:04  8.4  0.62  83
PPM 161139     14:59:45.1 +02:50:45 10.6  0.30  82
14DC143        14:59:46.5 +02:32:33 16.1        82
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 14DC143, (2021/06/26 17:06UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.1 +19:10:15  0.0 19.61  99
Unukalhai      15:44:16.3 +06:25:33  2.6 11.98  74
110 Vir        15:02:54.0 +02:05:29  4.4  1.18  81
PPM 161109     14:56:30.9 +02:55:12  8.4  0.62  83
PPM 161139     14:58:40.1 +02:55:51 10.6  0.30  82
14DC143        14:58:41.4 +02:37:38 16.1        82
Positions are for J2000

Event circumstances last updated at 2021/01/22 21:30:08 UT

Marc W. Buie, Southwest Research Institute

RECON