RECON: TNO occultation with 523731

Event between (523731) 14OK394 and star GA1060:00518887 with event index number of 2373254

Geocentric closest approach at 2024/08/13 14:55:11 UTC

J2000 position of star is 04:23:39.1 +17:53:16
Equinox of date position of star is 04:25:02.4 +17:56:31
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 171 degrees from the moon. Moon is 60% illuminated.
Apparent brightness V=22.1

Object is 37.2 AU from the Sun and 37.5 AU from the Earth.
Apparent velocity is 13.1 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 227 seconds.
The 1-sigma cross-track error in the shadow position is 1462 km.

The object has an absolute magnitude Hv=6.2
Diameter=332.7 km assuming a 5% albedo -- 26.0 sec chord
Diameter=135.8 km assuming a 30% albedo -- 10.6 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 
 
 

Star training set for 523731, (2024/08/13 14:42UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:20.2 +16:33:25  0.8  3.24 168
44Zet Per      03:55:41.2 +31:57:17  2.8 15.50 173
61Del1Tau      04:24:21.5 +17:35:54  3.8  0.38 171
PPM 119813     04:22:49.5 +18:19:24  8.1  0.66 171
61Del1Tau      04:24:21.5 +17:35:54  3.8  0.38 171
PPM 119863     04:26:05.9 +17:42:06 10.5  0.34 171
523731         04:25:04.5 +17:56:36 16.7       171
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 523731, (2024/08/13 14:42UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8  3.24 168
44Zet Per      03:54:07.9 +31:53:01  2.8 15.50 173
61Del1Tau      04:22:56.3 +17:32:32  3.8  0.38 171
PPM 119813     04:21:23.9 +18:15:59  8.1  0.66 171
61Del1Tau      04:22:56.3 +17:32:32  3.8  0.38 171
PPM 119863     04:24:40.6 +17:38:48 10.5  0.34 171
523731         04:23:39.1 +17:53:16 16.7       171
Positions are for J2000

Event circumstances last updated at 2024/01/08 05:08:22 UT

Marc W. Buie, Southwest Research Institute

RECON