RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0600:27808554 with event index number of 1385722

Geocentric closest approach at 2024/10/18 15:13:22 UTC

J2000 position of star is 17:53:12.0 -29:51:56
Equinox of date position of star is 17:54:46.0 -29:52:08
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 134 degrees from the moon. Moon is 98% illuminated.
Apparent brightness V=20.4

Object is 15.2 AU from the Sun and 15.6 AU from the Earth.
Apparent velocity is 23.2 km/sec on the sky relative to the star, or, 7.4 arcsec/hr.
The 1-sigma error in the time of the event is 79 seconds.
The 1-sigma cross-track error in the shadow position is 637 km.

The object has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 5.9 sec chord
Diameter=55.6 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 469442, (2024/10/18 15:14UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:55.9 -26:29:05  0.9 18.76 152
34Ups Sco      17:32:27.2 -37:18:47  2.7  8.77 137
PPM 296839     17:50:47.2 -31:42:33  4.9  2.03 134
PPM 296917     17:53:47.2 -30:09:21  8.4  0.36 134
PPM 296932     17:54:20.1 -30:05:43  9.0  0.25 134
469442         17:54:47.3 -29:52:09 16.8       133
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, (2024/10/18 15:14UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.76 152
34Ups Sco      17:30:45.8 -37:17:46  2.7  8.77 137
PPM 296839     17:49:10.5 -31:42:12  4.9  2.03 134
PPM 296917     17:52:11.7 -30:09:06  8.4  0.36 134
PPM 296932     17:52:44.6 -30:05:29  9.0  0.25 134
469442         17:53:12.0 -29:51:56 16.8       134
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:51:20 UT

Marc W. Buie, Southwest Research Institute

RECON