RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0660:22404486 with event index number of 2320003

Geocentric closest approach at 2022/08/15 16:39:04 UTC

J2000 position of star is 17:59:30.1 -22:17:12
Equinox of date position of star is 18:00:50.5 -22:17:12
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 102 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=21.5

TNO is 13.3 AU from the Sun and 12.7 AU from the Earth.
The TNO is moving 8.6 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 141 seconds.
The 1-sigma cross-track error in the shadow position is 623 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=59.4 km assuming a 5% albedo -- 6.9 sec chord
Diameter=24.3 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 492338, (2022/08/15 16:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.9 -26:28:49  0.9 20.90 121
Nunki          18:56:40.0 -26:16:00  2.0 13.32  89
PPM 267709     18:03:16.7 -22:46:45  5.8  0.74 101
PPM 267623     18:00:48.4 -22:28:01  7.5  0.18 102
PPM 267605     18:00:17.4 -22:23:08  9.0  0.17 102
492338         18:00:52.0 -22:17:12 16.5       101
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, (2022/08/15 16:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.90 121
Nunki          18:55:15.9 -26:17:49  2.0 13.32  89
PPM 267709     18:01:54.4 -22:46:50  5.8  0.74 101
PPM 267623     17:59:26.3 -22:28:01  7.5  0.18 102
PPM 267605     17:58:55.4 -22:23:07  9.0  0.17 102
492338         17:59:30.1 -22:17:12 16.5       102
Positions are for J2000

Event circumstances last updated at 2022/03/16 00:56:52 UT

Marc W. Buie, Southwest Research Institute

RECON