RECON: TNO occultation with 13JX67

Event between 13JX67 and star GA0740:06160814 with event index number of 1569014

Geocentric closest approach at 2021/06/23 22:45:04 UTC

J2000 position of star is 16:36:32.2 -15:54:49
Equinox of date position of star is 16:37:45.3 -15:57:20
Stellar brightness G=13.7, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 13 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=23.0

TNO is 42.5 AU from the Sun and 41.6 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 119 seconds.
The 1-sigma cross-track error in the shadow position is 1656 km.

The TNO has an absolute magnitude Hv=6.7
Diameter=272.9 km assuming a 5% albedo -- 12.1 sec chord
Diameter=111.4 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 13JX67, (2021/06/23 22:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.7 -26:28:40  0.9 10.65  12
13Zet Oph      16:38:20.6 -10:36:32  2.6  5.35  17
8Phi Oph       16:32:22.3 -16:39:28  4.0  1.47  14
PPM 231822     16:33:51.8 -16:01:57  7.5  0.94  14
PPM 231886     16:37:06.8 -15:57:52  9.6  0.16  13
13JX67         16:37:45.9 -15:57:21 13.7        13
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 13JX67, (2021/06/23 22:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.65  12
13Zet Oph      16:37:09.6 -10:34:01  2.6  5.35  17
8Phi Oph       16:31:08.3 -16:36:46  4.0  1.47  14
PPM 231822     16:32:38.1 -15:59:18  7.5  0.94  14
PPM 231886     16:35:53.1 -15:55:18  9.6  0.16  13
13JX67         16:36:32.2 -15:54:49 13.7        13
Positions are for J2000

Event circumstances last updated at 2021/04/21 22:32:55 UT

Marc W. Buie, Southwest Research Institute

RECON