RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0600:11459712 with event index number of 1103860

Geocentric closest approach at 2022/06/11 10:02:52 UTC

J2000 position of star is 16:54:12.7 -28:12:35
Equinox of date position of star is 16:55:36.3 -28:14:40
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 38 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=20.3

TNO is 16.5 AU from the Sun and 15.5 AU from the Earth.
The TNO is moving 20.7 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
The 1-sigma error in the time of the event is 49 seconds.
The 1-sigma cross-track error in the shadow position is 601 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 6.6 sec chord
Diameter=55.6 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 469442, (2022/06/11 10:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.2 -26:28:48  0.9  5.79  32
23Tau Sco      16:37:17.0 -28:15:38  2.8  4.04  34
PPM 295639     16:56:02.1 -30:37:20  6.5  2.38  39
PPM 266085     16:54:37.5 -28:29:00  8.2  0.32  38
PPM 266112     16:55:43.3 -28:10:35  9.5  0.07  38
469442         16:55:37.2 -28:14:41 16.9        39
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, (2022/06/11 10:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  5.79  32
23Tau Sco      16:35:52.9 -28:12:58  2.8  4.04  34
PPM 295639     16:54:36.0 -30:35:14  6.5  2.38  39
PPM 266085     16:53:12.9 -28:26:52  8.2  0.32  38
PPM 266112     16:54:18.9 -28:08:29  9.5  0.07  38
469442         16:54:12.7 -28:12:35 16.9        38
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:04:32 UT

Marc W. Buie, Southwest Research Institute

RECON