RECON: TNO occultation with 523766

Event between (523766) 14WF510 and star GA0900:00574522 with event index number of 2178751

Geocentric closest approach at 2024/08/12 00:27:36 UTC

J2000 position of star is 05:08:53.7 +00:44:42
Equinox of date position of star is 05:10:07.5 +00:46:27
Stellar brightness G=14.3, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 139 degrees from the moon. Moon is 44% illuminated.
Apparent brightness V=22.3

Object is 32.2 AU from the Sun and 32.6 AU from the Earth.
Apparent velocity is 21.6 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 82 seconds.
The 1-sigma cross-track error in the shadow position is 1448 km.

The object has an absolute magnitude Hv=7.0
Diameter=238.8 km assuming a 5% albedo -- 11.2 sec chord
Diameter=97.5 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523766, (2024/08/12 00:29UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:43.3 -08:10:30  0.1  9.06 133
67Bet Eri      05:09:03.7 -05:03:23  2.8  5.84 136
PPM 148621     05:14:48.3 +01:59:41  6.4  1.68 138
PPM 148467     05:08:32.9 +01:01:19  7.9  0.47 139
PPM 148503     05:09:38.3 +00:47:43  8.8  0.13 139
523766         05:10:09.8 +00:46:30 14.3       139
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 523766, (2024/08/12 00:29UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1  9.06 133
67Bet Eri      05:07:50.8 -05:05:13  2.8  5.84 136
PPM 148621     05:13:31.5 +01:58:03  6.4  1.68 138
PPM 148467     05:07:16.7 +00:59:28  7.9  0.47 139
PPM 148503     05:08:22.2 +00:45:54  8.8  0.13 139
523766         05:08:53.7 +00:44:42 14.3       139
Positions are for J2000

Event circumstances last updated at 2023/11/08 05:28:21 UT

Marc W. Buie, Southwest Research Institute

RECON