RECON: TNO occultation with 523766

Event between (523766) 14WF510 and star GA0880:00497042 with event index number of 2178715

Geocentric closest approach at 2023/12/22 19:03:53 UTC

J2000 position of star is 04:55:20.1 -00:14:17
Equinox of date position of star is 04:56:33.3 -00:12:05
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 40 degrees from the moon. Moon is 81% illuminated.
Apparent brightness V=22.1

Object is 32.1 AU from the Sun and 31.2 AU from the Earth.
Apparent velocity is 23.3 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 74 seconds.
The 1-sigma cross-track error in the shadow position is 1146 km.

The object has an absolute magnitude Hv=7.0
Diameter=238.8 km assuming a 5% albedo -- 10.3 sec chord
Diameter=97.5 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523766, (2023/12/22 19:03UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:41.5 -08:10:32  0.1  9.29  48
67Bet Eri      05:09:01.8 -05:03:26  2.8  5.77  45
PPM 148162     04:56:04.7 +00:30:15  5.7  0.72  40
PPM 175676     04:56:35.8 -00:18:58  8.4  0.12  40
PPM 175670     04:56:11.5 -00:09:29 11.0  0.10  40
523766         04:56:33.7 -00:12:04 16.6        41
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, (2023/12/22 19:03UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1  9.29  48
67Bet Eri      05:07:50.8 -05:05:13  2.8  5.77  45
PPM 148162     04:54:50.7 +00:28:02  5.7  0.72  40
PPM 175676     04:55:22.2 -00:21:10  8.4  0.12  40
PPM 175670     04:54:57.8 -00:11:42 11.0  0.10  40
523766         04:55:20.1 -00:14:17 16.6        40
Positions are for J2000

Event circumstances last updated at 2023/11/06 05:16:52 UT

Marc W. Buie, Southwest Research Institute

RECON