RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0600:21346160 with event index number of 1209710

Geocentric closest approach at 2023/06/16 17:08:51 UTC

J2000 position of star is 17:24:21.2 -29:27:58
Equinox of date position of star is 17:25:50.2 -29:29:09
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 166 degrees from the moon. Moon is 2% illuminated.
Apparent brightness V=20.1

Object is 15.9 AU from the Sun and 14.9 AU from the Earth.
Apparent velocity is 20.5 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 70 seconds.
The 1-sigma cross-track error in the shadow position is 590 km.

The object has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 6.7 sec chord
Diameter=55.6 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 469442, (2023/06/16 17:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.0 -26:28:55  0.9 12.50 178
34Ups Sco      17:32:21.7 -37:18:44  2.7  7.94 161
PPM 266892     17:29:07.4 -29:44:33  6.4  0.76 165
PPM 266811     17:25:23.8 -29:50:29  7.8  0.37 166
PPM 266791     17:24:38.6 -29:33:15  9.5  0.27 166
469442         17:25:50.8 -29:29:10 16.8       165
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, (2023/06/16 17:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.50 178
34Ups Sco      17:30:45.8 -37:17:46  2.7  7.94 161
PPM 266892     17:27:37.5 -29:43:29  6.4  0.76 165
PPM 266811     17:23:54.0 -29:49:17  7.8  0.37 166
PPM 266791     17:23:09.0 -29:32:01  9.5  0.27 166
469442         17:24:21.2 -29:27:58 16.8       166
Positions are for J2000

Event circumstances last updated at 2023/04/19 02:38:22 UT

Marc W. Buie, Southwest Research Institute

RECON