RECON: TNO occultation with 11HJ103

Event between 11HJ103 and star GA0680:35297244 with event index number of 2118273

Geocentric closest approach at 2022/10/20 09:12:06 UTC

J2000 position of star is 19:35:21.2 -20:26:38
Equinox of date position of star is 19:36:41.5 -20:23:32
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 145 degrees from the moon. Moon is 26% illuminated.
TNO apparent brightness V=24.3

TNO is 39.8 AU from the Sun and 39.8 AU from the Earth.
The TNO is moving 7.9 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 1967 seconds.
The 1-sigma cross-track error in the shadow position is 3492 km.

The TNO has an absolute magnitude Hv=8.1
Diameter=146.6 km assuming a 5% albedo -- 18.6 sec chord
Diameter=59.8 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 11HJ103, (2022/10/20 09:12UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:48.6 -26:28:50  0.9 42.85 104
Nunki          18:56:40.6 -26:15:59  2.0 10.90 136
PPM 236251     19:38:22.6 -18:10:43  5.7  2.25 146
PPM 270002     19:36:56.6 -20:43:53  7.2  0.34 145
PPM 270009     19:37:09.9 -20:18:06  9.4  0.14 146
11HJ103        19:36:41.7 -20:23:32 15.5       146
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, (2022/10/20 09:12UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 42.85 104
Nunki          18:55:15.9 -26:17:49  2.0 10.90 136
PPM 236251     19:37:03.4 -18:13:52  5.7  2.25 146
PPM 270002     19:35:36.0 -20:46:59  7.2  0.34 145
PPM 270009     19:35:49.5 -20:21:13  9.4  0.14 146
11HJ103        19:35:21.2 -20:26:38 15.5       145
Positions are for J2000

Event circumstances last updated at 2022/10/01 04:15:32 UT

Marc W. Buie, Southwest Research Institute

RECON