RECON: TNO occultation with 612158

Event between (612158) 00FV53 and star GA0800:05466560 with event index number of 2807003

Geocentric closest approach at 2022/06/27 18:34:50 UTC

J2000 position of star is 16:33:54.4 -09:49:40
Equinox of date position of star is 16:35:07.9 -09:52:24
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 160 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=23.5

TNO is 34.7 AU from the Sun and 33.8 AU from the Earth.
The TNO is moving 20.9 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 340 seconds.
The 1-sigma cross-track error in the shadow position is 1370 km.

The TNO has an absolute magnitude Hv=8.1
Diameter=147.2 km assuming a 5% albedo -- 7.0 sec chord
Diameter=60.1 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 612158, (2022/06/27 18:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.4 -26:28:48  0.9 16.64 168
13Zet Oph      16:38:24.0 -10:36:39  2.6  1.09 162
PPM 199862     16:40:01.2 -08:39:42  6.4  1.71 160
PPM 199799     16:36:34.0 -09:43:03  8.4  0.38 161
PPM 199763     16:34:25.3 -09:59:14  9.6  0.21 160
612158         16:35:08.4 -09:52:25 16.9       161
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 612158, (2022/06/27 18:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.64 168
13Zet Oph      16:37:09.6 -10:34:01  2.6  1.09 162
PPM 199862     16:38:47.7 -08:37:07  6.4  1.71 160
PPM 199799     16:35:20.1 -09:40:22  8.4  0.38 161
PPM 199763     16:33:11.3 -09:56:29  9.6  0.21 160
612158         16:33:54.4 -09:49:40 16.9       160
Positions are for J2000

Event circumstances last updated at 2022/05/03 00:32:11 UT

Marc W. Buie, Southwest Research Institute

RECON