RECON: TNO occultation with 13GW141

Event between 13GW141 and star GA0820:04335838 with event index number of 1571243

Geocentric closest approach at 2020/06/14 10:47:28 UTC

J2000 position of star is 13:13:58.2 -06:34:10
Equinox of date position of star is 13:15:01.3 -06:40:34
Stellar brightness G=12.8, use SENSEUP=32
Star is 167 degrees from the moon. Moon is 39% illuminated.
TNO apparent brightness V=24.2

TNO is 25.0 AU from the Sun and 24.6 AU from the Earth.
The TNO is moving 7.9 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 268 seconds.
The 1-sigma cross-track error in the shadow position is 1642 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=141.3 km assuming a 5% albedo -- 7.6 sec chord
Diameter=57.7 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 
 
 

Star training set for 13GW141, (2020/06/14 10:47UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:16.4 -11:16:03  1.0  5.36 161
51The Vir      13:11:00.7 -05:38:52  4.4  1.44 168
PPM 196347     13:17:53.5 -07:02:32  8.4  0.80 166
PPM 196306     13:15:18.8 -06:55:16  9.7  0.25 166
13GW141        13:15:02.1 -06:40:39 12.8       166
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 13GW141, (2020/06/14 10:47UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  5.36 161
51The Vir      13:09:57.0 -05:32:21  4.4  1.44 168
PPM 196347     13:16:49.5 -06:56:06  8.4  0.80 166
PPM 196306     13:14:14.9 -06:48:48  9.7  0.25 166
13GW141        13:13:58.2 -06:34:10 12.8       167
Positions are for J2000

Event circumstances last updated at 2020/03/10 21:37:25 UT

Marc W. Buie, Southwest Research Institute

RECON