RECON: TNO occultation with 576162

Event between (576162) 12GT41 and star GA0900:06273026 with event index number of 2520998

Geocentric closest approach at 2022/06/24 02:08:00 UTC

J2000 position of star is 17:58:53.3 +01:41:28
Equinox of date position of star is 17:59:59.1 +01:41:27
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 124 degrees from the moon. Moon is 22% illuminated.
TNO apparent brightness V=21.9

TNO is 16.8 AU from the Sun and 15.8 AU from the Earth.
The TNO is moving 21.5 km/sec on the sky relative to the star, or, 6.8 arcsec/hr.
The 1-sigma error in the time of the event is 43 seconds.
The 1-sigma cross-track error in the shadow position is 639 km.

The TNO has an absolute magnitude Hv=9.6
Diameter=73.8 km assuming a 5% albedo -- 3.4 sec chord
Diameter=30.1 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 576162, (2022/06/24 02:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.4 -26:28:48  0.9 35.45 147
60Bet Oph      17:44:35.0 +04:33:34  2.8  4.80 127
PPM 164858     17:57:27.1 +00:40:08  5.7  1.21 125
PPM 164835     17:56:45.5 +02:04:23  7.4  0.90 125
PPM 164937     18:00:11.3 +02:00:44 10.0  0.32 124
PPM 164950     18:00:38.3 +01:33:42 10.1  0.20 124
576162         18:00:01.5 +01:41:27 15.9       124
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 576162, (2022/06/24 02:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 35.45 147
60Bet Oph      17:43:28.3 +04:34:06  2.8  4.80 127
PPM 164858     17:56:18.3 +00:40:14  5.7  1.21 125
PPM 164835     17:55:37.5 +02:04:30  7.4  0.90 125
PPM 164937     17:59:03.3 +02:00:45 10.0  0.32 124
PPM 164950     17:59:30.0 +01:33:42 10.1  0.20 124
576162         17:58:53.3 +01:41:28 15.9       124
Positions are for J2000

Event circumstances last updated at 2021/09/04 01:28:07 UT

Marc W. Buie, Southwest Research Institute

RECON