RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0600:14484431 with event index number of 1103751

Geocentric closest approach at 2022/03/31 07:26:14 UTC

J2000 position of star is 17:04:30.8 -28:06:35
Equinox of date position of star is 17:05:54.4 -28:08:21
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 101 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=20.7

TNO is 16.6 AU from the Sun and 16.2 AU from the Earth.
The TNO is moving 4.1 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 213 seconds.
The 1-sigma cross-track error in the shadow position is 1031 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 33.2 sec chord
Diameter=55.6 km assuming a 30% albedo -- 13.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 469442, (2022/03/31 07:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.5 -26:28:46  0.9  7.98 109
23Tau Sco      16:37:16.3 -28:15:37  2.8  6.31 107
PPM 266416     17:08:16.1 -26:32:28  6.3  1.68 100
PPM 266343     17:05:23.0 -28:17:10  8.1  0.19 101
PPM 266359     17:06:00.0 -28:01:53  9.4  0.11 101
469442         17:05:54.6 -28:08:21 16.9       100
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 469442, (2022/03/31 07:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.98 109
23Tau Sco      16:35:52.9 -28:12:58  2.8  6.31 107
PPM 266416     17:06:53.2 -26:30:47  6.3  1.68 100
PPM 266343     17:03:59.1 -28:15:23  8.1  0.19 101
PPM 266359     17:04:36.2 -28:00:07  9.4  0.11 101
469442         17:04:30.8 -28:06:35 16.9       101
Positions are for J2000

Event circumstances last updated at 2022/03/15 00:59:58 UT

Marc W. Buie, Southwest Research Institute

RECON