RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0600:13225698 with event index number of 1103791

Geocentric closest approach at 2022/05/06 22:20:31 UTC

J2000 position of star is 17:00:56.2 -28:15:18
Equinox of date position of star is 17:02:19.9 -28:17:10
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 144 degrees from the moon. Moon is 31% illuminated.
TNO apparent brightness V=20.5

TNO is 16.5 AU from the Sun and 15.7 AU from the Earth.
The TNO is moving 16.7 km/sec on the sky relative to the star, or, 5.3 arcsec/hr.
The 1-sigma error in the time of the event is 68 seconds.
The 1-sigma cross-track error in the shadow position is 612 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 8.2 sec chord
Diameter=55.6 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 469442, (2022/05/06 22:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.9 -26:28:47  0.9  7.23 137
23Tau Sco      16:37:16.6 -28:15:38  2.8  5.52 138
PPM 266416     17:08:16.5 -26:32:29  6.3  2.19 145
PPM 266270     17:02:27.7 -28:35:04  7.6  0.30 144
PPM 266278     17:02:40.3 -28:10:17  9.4  0.14 144
469442         17:02:20.4 -28:17:10 15.6       144
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, (2022/05/06 22:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  7.23 137
23Tau Sco      16:35:52.9 -28:12:58  2.8  5.52 138
PPM 266416     17:06:53.2 -26:30:47  6.3  2.19 145
PPM 266270     17:01:03.3 -28:33:12  7.6  0.30 144
PPM 266278     17:01:16.1 -28:08:25  9.4  0.14 144
469442         17:00:56.2 -28:15:18 15.6       144
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:01:42 UT

Marc W. Buie, Southwest Research Institute

RECON