RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0640:38308554 with event index number of 2322424

Geocentric closest approach at 2026/08/21 01:41:58 UTC

J2000 position of star is 20:04:29.9 -25:26:02
Equinox of date position of star is 20:05:58.4 -25:21:47
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 49 degrees from the moon. Moon is 59% illuminated.
Apparent brightness V=22.4

Object is 17.0 AU from the Sun and 16.1 AU from the Earth.
Apparent velocity is 18.1 km/sec on the sky relative to the star, or, 5.6 arcsec/hr.
The 1-sigma error in the time of the event is 256 seconds.
The 1-sigma cross-track error in the shadow position is 1337 km.

The object has an absolute magnitude Hv=10.0
Diameter=59.4 km assuming a 5% albedo -- 3.3 sec chord
Diameter=24.3 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 492338, (2026/08/21 01:42UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:06.9 -29:28:49  1.2 38.40  84
38Zet Sgr      19:04:18.2 -29:50:23  2.7 14.39  35
60 Sgr         20:00:34.3 -26:07:18  4.5  1.46  48
PPM 270700     20:08:12.8 -25:29:54  8.5  0.50  50
PPM 270629     20:05:23.6 -25:14:03  9.4  0.20  49
492338         20:06:06.3 -25:21:25 15.6        50
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, (2026/08/21 01:42UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 38.40  84
38Zet Sgr      19:02:36.7 -29:52:49  2.7 14.39  35
60 Sgr         19:58:57.3 -26:11:44  4.5  1.46  48
PPM 270700     20:06:36.5 -25:34:36  8.5  0.50  50
PPM 270629     20:03:47.3 -25:18:39  9.4  0.20  49
492338         20:04:29.9 -25:26:02 15.6        49
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:32:38 UT

Marc W. Buie, Southwest Research Institute

RECON