RECON: TNO occultation with 10GX34

Event between 10GX34 and star GA0680:35035876 with event index number of 1092521

Geocentric closest approach at 2021/05/17 21:07:04 UTC

J2000 position of star is 19:26:24.1 -20:11:30
Equinox of date position of star is 19:27:38.3 -20:08:54
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 165 degrees from the moon. Moon is 31% illuminated.
TNO apparent brightness V=20.9

TNO is 16.7 AU from the Sun and 16.0 AU from the Earth.
The TNO is moving 9.1 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 975 seconds.
The 1-sigma cross-track error in the shadow position is 3329 km.

The TNO has an absolute magnitude Hv=8.5
Diameter=120.8 km assuming a 5% albedo -- 13.2 sec chord
Diameter=49.3 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10GX34, (2021/05/17 21:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.3 -26:28:39  0.9 40.92 126
Nunki          18:56:35.4 -26:16:06  2.0  9.40 158
50 Sgr         19:27:35.5 -21:43:58  5.6  1.59 165
PPM 236018     19:29:18.3 -19:17:53  8.1  0.93 165
PPM 236007     19:28:32.2 -19:55:05  9.6  0.31 165
10GX34         19:27:39.6 -20:08:51 14.2       165
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, (2021/05/17 21:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 40.92 126
Nunki          18:55:15.9 -26:17:49  2.0  9.40 158
50 Sgr         19:26:19.2 -21:46:36  5.6  1.59 165
PPM 236018     19:28:03.3 -19:20:34  8.1  0.93 165
PPM 236007     19:27:16.8 -19:57:45  9.6  0.31 165
10GX34         19:26:24.1 -20:11:30 14.2       165
Positions are for J2000

Event circumstances last updated at 2021/01/02 19:48:44 UT

Marc W. Buie, Southwest Research Institute

RECON