RECON: TNO occultation with 523746

Event between (523746) 14UT114 and star GA1240:02622808 with event index number of 2322891

Geocentric closest approach at 2023/02/12 22:13:26 UTC

J2000 position of star is 06:18:11.5 +34:19:31
Equinox of date position of star is 06:19:43.2 +34:18:52
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 130 degrees from the moon. Moon is 58% illuminated.
Apparent brightness V=21.1

Object is 16.1 AU from the Sun and 15.5 AU from the Earth.
Apparent velocity is 12.4 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 355 seconds.
The 1-sigma cross-track error in the shadow position is 2087 km.

The object has an absolute magnitude Hv=8.9
Diameter=95.5 km assuming a 5% albedo -- 7.9 sec chord
Diameter=39.0 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523746, (2023/02/12 22:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.7 +27:58:07  1.1 19.62 112
34Bet Aur      06:01:13.5 +44:56:50  1.9 11.21 131
PPM 071342     06:13:51.0 +32:41:10  5.8  2.04 132
PPM 071494     06:20:39.7 +33:47:03  8.3  0.56 130
PPM 071492     06:20:31.2 +34:13:10  9.5  0.19 130
523746         06:19:43.6 +34:18:52 16.9       130
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 523746, (2023/02/12 22:13UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 19.62 112
34Bet Aur      05:59:31.6 +44:56:51  1.9 11.21 131
PPM 071342     06:12:20.1 +32:41:36  5.8  2.04 132
PPM 071494     06:19:08.0 +33:47:43  8.3  0.56 130
PPM 071492     06:18:59.2 +34:13:50  9.5  0.19 130
523746         06:18:11.5 +34:19:31 16.9       130
Positions are for J2000

Event circumstances last updated at 2023/01/09 03:32:52 UT

Marc W. Buie, Southwest Research Institute

RECON