RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0640:37848381 with event index number of 2322317

Geocentric closest approach at 2025/09/25 06:53:23 UTC

J2000 position of star is 19:35:02.7 -25:26:44
Equinox of date position of star is 19:36:32.1 -25:23:25
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 70 degrees from the moon. Moon is 11% illuminated.
Apparent brightness V=22.3

Object is 16.1 AU from the Sun and 15.7 AU from the Earth.
Apparent velocity is 1.5 km/sec on the sky relative to the star, or, 0.5 arcsec/hr.
The 1-sigma error in the time of the event is 2172 seconds.
The 1-sigma cross-track error in the shadow position is 1689 km.

The object has an absolute magnitude Hv=10.0
Diameter=59.4 km assuming a 5% albedo -- 38.4 sec chord
Diameter=24.3 km assuming a 30% albedo -- 15.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 492338, (2025/09/25 06:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:59.4 -26:29:13  0.9 41.51  29
38Zet Sgr      19:04:14.8 -29:50:28  2.7  8.44  62
52 Sgr         19:38:16.2 -24:49:29  4.6  0.68  71
PPM 270018     19:37:38.1 -25:50:33  8.4  0.51  70
PPM 270001     19:37:08.6 -25:25:38  9.6  0.13  70
492338         19:36:36.7 -25:23:14 14.2        71
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, (2025/09/25 06:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 41.51  29
38Zet Sgr      19:02:36.7 -29:52:49  2.7  8.44  62
52 Sgr         19:36:42.5 -24:53:01  4.6  0.68  71
PPM 270018     19:36:03.8 -25:54:05  8.4  0.51  70
PPM 270001     19:35:34.5 -25:29:08  9.6  0.13  70
492338         19:35:02.7 -25:26:44 14.2        70
Positions are for J2000

Event circumstances last updated at 2024/06/18 02:54:17 UT

Marc W. Buie, Southwest Research Institute

RECON