RECON: TNO occultation with 523755

Event between (523755) 14WZ508 and star GA0700:05033976 with event index number of 2614930

Geocentric closest approach at 2028/07/13 09:25:41 UTC

J2000 position of star is 12:22:33.3 -18:26:03
Equinox of date position of star is 12:23:49.6 -18:34:11
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 168 degrees from the moon. Moon is 64% illuminated.
Apparent brightness V=23.1

Object is 31.6 AU from the Sun and 31.7 AU from the Earth.
Apparent velocity is 11.4 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 232 seconds.
The 1-sigma cross-track error in the shadow position is 2621 km.

The object has an absolute magnitude Hv=7.9
Diameter=158.5 km assuming a 5% albedo -- 13.9 sec chord
Diameter=64.7 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523755, (2028/07/13 09:26UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:42.0 -11:18:33  1.0 16.78 161
4Gam Crv       12:17:16.7 -17:42:01  2.6  1.84 169
PPM 225621     12:18:31.9 -16:51:08  6.3  2.18 170
PPM 225775     12:25:21.8 -19:23:01  7.6  0.85 167
PPM 225726     12:23:20.7 -18:33:29  8.6  0.17 168
523755         12:24:02.3 -18:35:32 14.5       168
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, (2028/07/13 09:26UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 16.78 161
4Gam Crv       12:15:48.1 -17:32:30  2.6  1.84 169
PPM 225621     12:17:03.3 -16:41:38  6.3  2.18 170
PPM 225775     12:23:52.6 -19:13:32  7.6  0.85 167
PPM 225726     12:21:51.7 -18:24:00  8.6  0.17 168
523755         12:22:33.3 -18:26:03 14.5       168
Positions are for J2000

Event circumstances last updated at 2024/06/24 21:33:05 UT

Marc W. Buie, Southwest Research Institute

RECON