RECON: TNO occultation with 523682

Event between (523682) 14CN23 and star GA0540:10397593 with event index number of 2648015

Geocentric closest approach at 2022/02/13 22:44:15 UTC

J2000 position of star is 16:31:49.7 -35:03:27
Equinox of date position of star is 16:33:16.2 -35:06:11
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 138 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=21.6

TNO is 17.7 AU from the Sun and 18.0 AU from the Earth.
The TNO is moving 17.0 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 179 seconds.
The 1-sigma cross-track error in the shadow position is 1967 km.

The TNO has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 6.1 sec chord
Diameter=42.8 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523682, (2022/02/13 22:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.0 -26:28:45  0.9  8.64 136
26Eps Sco      16:51:36.0 -34:19:53  2.3  3.84 141
PPM 295143     16:32:49.9 -34:45:02  4.2  0.36 138
PPM 295190     16:35:19.7 -35:35:14  7.7  0.64 138
PPM 295166     16:33:55.2 -35:02:45  9.4  0.14 138
523682         16:33:17.0 -35:06:12 16.7       138
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 523682, (2022/02/13 22:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  8.64 136
26Eps Sco      16:50:08.7 -34:17:41  2.3  3.84 141
PPM 295143     16:31:22.9 -34:42:16  4.2  0.36 138
PPM 295190     16:33:52.0 -35:32:33  7.7  0.64 138
PPM 295166     16:32:27.9 -35:00:01  9.4  0.14 138
523682         16:31:49.7 -35:03:27 16.7       138
Positions are for J2000

Event circumstances last updated at 2021/12/06 01:46:28 UT

Marc W. Buie, Southwest Research Institute

RECON