RECON: TNO occultation with 523965

Event between (523965) 98XY95 and star GA1160:02997065 with event index number of 2593904

Geocentric closest approach at 2023/03/17 14:23:38 UTC

J2000 position of star is 08:09:25.6 +26:43:30
Equinox of date position of star is 08:10:50.0 +26:39:20
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 178 degrees from the moon. Moon is 23% illuminated.
Apparent brightness V=22.2

Object is 37.7 AU from the Sun and 37.2 AU from the Earth.
Apparent velocity is 11.0 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 370 seconds.
The 1-sigma cross-track error in the shadow position is 1728 km.

The object has an absolute magnitude Hv=6.3
Diameter=323.6 km assuming a 5% albedo -- 29.6 sec chord
Diameter=132.1 km assuming a 30% albedo -- 12.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 523965, (2023/03/17 14:22UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:44.0 +27:58:06  1.1  5.51 173
PPM 098327     08:07:02.1 +27:27:45  6.1  1.17 177
PPM 098393     08:10:14.5 +27:24:39  8.0  0.77 177
PPM 098419     08:11:38.6 +27:01:10  8.9  0.41 178
PPM 098400     08:10:40.3 +26:49:59 11.2  0.18 178
523965         08:10:50.1 +26:39:20 16.7       178
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 523965, (2023/03/17 14:22UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  5.51 173
PPM 098327     08:05:37.0 +27:31:49  6.1  1.17 177
PPM 098393     08:08:49.6 +27:28:48  8.0  0.77 177
PPM 098419     08:10:13.9 +27:05:21  8.9  0.41 178
PPM 098400     08:09:15.7 +26:54:09 11.2  0.18 178
523965         08:09:25.6 +26:43:30 16.7       178
Positions are for J2000

Event circumstances last updated at 2023/03/04 03:45:15 UT

Marc W. Buie, Southwest Research Institute

RECON