RECON: TNO occultation with 10GX34

Event between 10GX34 and star UC4-332-146953 with event index number of 303905

Geocentric closest approach at 2019/10/23 23:49:21 UTC

J2000 position of star is 18:19:54.5 -23:39:35
Equinox of date position of star is 18:21:03.3 -23:39:01
Stellar brightness R=15.8, use SENSEUP=128
Star is 122 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=21.0

TNO is 16.6 AU from the Sun and 17.0 AU from the Earth.
The TNO is moving 21.9 km/sec on the sky relative to the star, or, 6.4 arcsec/hr.
The 1-sigma error in the time of the event is 141 seconds.
The 1-sigma cross-track error in the shadow position is 1103 km.

The TNO has an absolute magnitude Hv=8.5
Diameter=120.8 km assuming a 5% albedo -- 5.5 sec chord
Diameter=49.3 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10GX34, (2019/10/23 23:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:37.5 -26:28:27  0.9 25.13  97
Nunki          18:56:29.5 -26:16:13  2.0  8.43 130
PPM 268291     18:22:44.5 -24:54:16  6.0  1.31 122
PPM 268251     18:21:07.2 -23:18:19  7.9  0.34 122
PPM 268240     18:20:44.7 -23:27:20  9.4  0.21 122
10GX34         18:21:07.0 -23:38:59 15.8       122
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 10GX34, (2019/10/23 23:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 25.13  97
Nunki          18:55:15.9 -26:17:49  2.0  8.43 130
PPM 268291     18:21:31.4 -24:54:54  6.0  1.31 122
PPM 268251     18:19:54.9 -23:18:55  7.9  0.34 122
PPM 268240     18:19:32.3 -23:27:55  9.4  0.21 122
10GX34         18:19:54.5 -23:39:35 15.8       122
Positions are for J2000

Event circumstances last updated at 2018/10/24 22:02:03 UT

Marc W. Buie, Southwest Research Institute

RECON