RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0600:47379128 with event index number of 1476814

Geocentric closest approach at 2026/05/15 21:05:08 UTC

J2000 position of star is 19:19:18.3 -29:53:33
Equinox of date position of star is 19:20:51.2 -29:50:45
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 115 degrees from the moon. Moon is 2% illuminated.
Apparent brightness V=20.0

Object is 14.6 AU from the Sun and 14.0 AU from the Earth.
Apparent velocity is 8.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 379 seconds.
The 1-sigma cross-track error in the shadow position is 2018 km.

The object has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 15.8 sec chord
Diameter=55.6 km assuming a 30% albedo -- 6.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 469442, (2026/05/15 21:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.7 -26:29:17  0.9 37.40 152
38Zet Sgr      19:04:17.2 -29:50:24  2.7  3.62 118
PPM 269757     19:26:43.5 -29:15:22  5.6  1.38 113
PPM 269689     19:23:43.8 -29:28:16  7.4  0.70 114
PPM 269635     19:21:35.0 -29:47:43  9.8  0.14 114
469442         19:20:58.4 -29:50:32 16.1       114
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, (2026/05/15 21:04UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 37.40 152
38Zet Sgr      19:02:36.7 -29:52:49  2.7  3.62 118
PPM 269757     19:25:04.0 -29:18:35  5.6  1.38 113
PPM 269689     19:22:04.1 -29:31:23  7.4  0.70 114
PPM 269635     19:19:55.0 -29:50:45  9.8  0.14 114
469442         19:19:18.3 -29:53:33 16.1       115
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:23:37 UT

Marc W. Buie, Southwest Research Institute

RECON