RECON: TNO occultation with 11HJ103

Event between 11HJ103 and star UC4-348-175675 with event index number of 202349

Geocentric closest approach at 2018/06/02 15:56:59 UTC

J2000 position of star is 19:16:24.0 -20:27:11
Equinox of date position of star is 19:17:26.4 -20:25:15
Stellar brightness R=16.0, use SENSEUP=128
Star is 9 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=25.4

TNO is 40.0 AU from the Sun and 39.2 AU from the Earth.
The TNO is moving 18.6 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 643 seconds.
The 1-sigma cross-track error in the shadow position is 2096 km.

The TNO has an absolute magnitude Hv=9.3
Diameter=82.0 km assuming a 5% albedo -- 4.4 sec chord
Diameter=33.5 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 11HJ103, (2018/06/02 15:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.4 -26:28:17  0.9 38.60  47
Nunki          18:56:24.4 -26:16:20  2.0  7.59  15
43 Sgr         19:18:42.7 -18:55:07  4.9  1.53   9
PPM 269570     19:18:17.7 -20:30:45  8.4  0.21   9
PPM 269549     19:17:14.3 -20:25:17  9.0  0.06   9
11HJ103        19:17:29.3 -20:25:09 16.0         9
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 11HJ103, (2018/06/02 15:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 38.60  47
Nunki          18:55:15.9 -26:17:49  2.0  7.59  15
43 Sgr         19:17:38.1 -18:57:11  4.9  1.53   9
PPM 269570     19:17:12.4 -20:32:48  8.4  0.21   9
PPM 269549     19:16:09.0 -20:27:18  9.0  0.06   9
11HJ103        19:16:24.0 -20:27:11 16.0         9
Positions are for J2000

Event circumstances last updated at 2017/08/02 16:52:36 UT

Marc W. Buie, Southwest Research Institute

RECON