RECON: TNO occultation with 11JW31

Event between 11JW31 and star UC4-349-170858 with event index number of 203034

Geocentric closest approach at 2019/06/06 00:46:20 UTC

J2000 position of star is 19:16:22.1 -20:23:42
Equinox of date position of star is 19:17:24.5 -20:21:46
Stellar brightness R=14.1, use SENSEUP=64
Star is 178 degrees from the moon. Moon is 9% illuminated.
TNO apparent brightness V=25.6

TNO is 42.5 AU from the Sun and 41.6 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 1292 seconds.
The 1-sigma cross-track error in the shadow position is 4065 km.

The TNO has an absolute magnitude Hv=9.3
Diameter=83.9 km assuming a 5% albedo -- 4.2 sec chord
Diameter=34.3 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 11JW31, (2019/06/06 00:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:25  0.9 38.61 141
Nunki          18:56:28.1 -26:16:15  2.0  7.63 173
43 Sgr         19:18:46.2 -18:55:01  4.9  1.47 177
PPM 269570     19:18:21.3 -20:30:39  8.4  0.25 178
PPM 269549     19:17:17.9 -20:25:10  9.0  0.08 178
11JW31         19:17:31.0 -20:21:34 14.1       178
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 11JW31, (2019/06/06 00:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 38.61 141
Nunki          18:55:15.9 -26:17:49  2.0  7.63 173
43 Sgr         19:17:38.1 -18:57:11  4.9  1.47 177
PPM 269570     19:17:12.4 -20:32:48  8.4  0.25 178
PPM 269549     19:16:09.0 -20:27:18  9.0  0.08 178
11JW31         19:16:22.1 -20:23:42 14.1       178
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:07:10 UT

Marc W. Buie, Southwest Research Institute

RECON