RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0660:35597377 with event index number of 2321092

Geocentric closest approach at 2023/03/19 21:28:05 UTC

J2000 position of star is 18:52:33.4 -22:51:18
Equinox of date position of star is 18:53:56.8 -22:49:32
Stellar brightness G=15.3, 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 5% illuminated.
Apparent brightness V=21.8

Object is 13.8 AU from the Sun and 14.0 AU from the Earth.
Apparent velocity is 16.0 km/sec on the sky relative to the star, or, 5.7 arcsec/hr.
The 1-sigma error in the time of the event is 132 seconds.
The 1-sigma cross-track error in the shadow position is 598 km.

The object has an absolute magnitude Hv=10.0
Diameter=59.4 km assuming a 5% albedo -- 3.7 sec chord
Diameter=24.3 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 492338, (2023/03/19 21:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.1 -26:28:53  0.9 32.62  84
Nunki          18:56:42.2 -26:15:57  2.0  3.50  51
35Nu 2Sgr      18:56:31.3 -22:38:25  4.3  0.62  51
PPM 269053     18:55:31.7 -22:32:23  8.1  0.46  52
PPM 269018     18:53:54.8 -22:50:45  9.9  0.02  52
492338         18:53:57.5 -22:49:31 15.3        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, (2023/03/19 21:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.62  84
Nunki          18:55:15.9 -26:17:49  2.0  3.50  51
35Nu 2Sgr      18:55:07.3 -22:40:17  4.3  0.62  51
PPM 269053     18:54:07.8 -22:34:13  8.1  0.46  52
PPM 269018     18:52:30.6 -22:52:32  9.9  0.02  52
492338         18:52:33.4 -22:51:18 15.3        52
Positions are for J2000

Event circumstances last updated at 2023/01/09 03:35:01 UT

Marc W. Buie, Southwest Research Institute

RECON