RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0640:38446842 with event index number of 2322401

Geocentric closest approach at 2026/05/04 01:52:11 UTC

J2000 position of star is 20:19:12.1 -24:09:20
Equinox of date position of star is 20:20:39.4 -24:04:39
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 52 degrees from the moon. Moon is 95% illuminated.
Apparent brightness V=22.5

Object is 16.7 AU from the Sun and 16.4 AU from the Earth.
Apparent velocity is 4.0 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 756 seconds.
The 1-sigma cross-track error in the shadow position is 4012 km.

The object has an absolute magnitude Hv=10.0
Diameter=59.4 km assuming a 5% albedo -- 14.8 sec chord
Diameter=24.3 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 492338, (2026/05/04 01:52UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:05.9 -29:28:55  1.2 35.58  83
38Zet Sgr      19:04:17.1 -29:50:24  2.7 17.97  34
4 Cap          20:19:34.0 -21:43:36  5.9  2.36  52
PPM 270965     20:20:28.4 -23:48:36  7.7  0.27  52
PPM 270980     20:21:11.7 -24:10:25  9.9  0.14  52
492338         20:20:46.0 -24:04:17 16.6        52
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 492338, (2026/05/04 01:52UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 35.58  83
38Zet Sgr      19:02:36.7 -29:52:49  2.7 17.97  34
4 Cap          20:18:01.4 -21:48:36  5.9  2.36  52
PPM 270965     20:18:54.6 -23:53:38  7.7  0.27  52
PPM 270980     20:19:37.8 -24:15:29  9.9  0.14  52
492338         20:19:12.1 -24:09:20 16.6        52
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:26:28 UT

Marc W. Buie, Southwest Research Institute

RECON