RECON: TNO occultation with 523755

Event between (523755) 14WZ508 and star GA0780:04157382 with event index number of 2614865

Geocentric closest approach at 2024/05/07 18:30:30 UTC

J2000 position of star is 11:53:04.8 -11:37:49
Equinox of date position of star is 11:54:18.8 -11:45:52
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 140 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=22.6

Object is 29.0 AU from the Sun and 28.3 AU from the Earth.
Apparent velocity is 15.4 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 104 seconds.
The 1-sigma cross-track error in the shadow position is 1620 km.

The object has an absolute magnitude Hv=7.9
Diameter=158.5 km assuming a 5% albedo -- 10.3 sec chord
Diameter=64.7 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523755, (2024/05/07 18:30UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:28.8 -11:17:16  1.0 22.57 161
4Gam Crv       12:17:03.7 -17:40:37  2.6  8.07 146
PPM 225013     11:52:36.2 -12:19:23  6.3  0.70 139
PPM 225007     11:52:21.1 -11:20:36  7.6  0.64 139
PPM 225017     11:52:48.4 -11:39:27  9.6  0.39 139
523755         11:54:19.5 -11:45:56 16.2       140
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 523755, (2024/05/07 18:30UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 22.57 161
4Gam Crv       12:15:48.1 -17:32:30  2.6  8.07 146
PPM 225013     11:51:21.5 -12:11:15  6.3  0.70 139
PPM 225007     11:51:06.4 -11:12:28  7.6  0.64 139
PPM 225017     11:51:33.8 -11:31:19  9.6  0.39 139
523755         11:53:04.8 -11:37:49 16.2       140
Positions are for J2000

Event circumstances last updated at 2024/02/12 04:21:48 UT

Marc W. Buie, Southwest Research Institute

RECON