RECON: TNO occultation with 523766

Event between (523766) 14WF510 and star GA0880:00629719 with event index number of 2178842

Geocentric closest approach at 2026/12/14 18:36:55 UTC

J2000 position of star is 05:22:02.2 -01:04:33
Equinox of date position of star is 05:23:15.1 -01:03:16
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 112 degrees from the moon. Moon is 27% illuminated.
Apparent brightness V=22.2

Object is 32.6 AU from the Sun and 31.7 AU from the Earth.
Apparent velocity is 24.7 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 100 seconds.
The 1-sigma cross-track error in the shadow position is 1192 km.

The object has an absolute magnitude Hv=7.0
Diameter=238.8 km assuming a 5% albedo -- 9.7 sec chord
Diameter=97.5 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523766, (2026/12/14 18:36UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:50.1 -08:10:21  0.1  7.37 109
34Del Ori      05:33:23.1 -00:16:53  2.2  2.61 115
PPM 175822     05:26:58.4 -01:28:10  6.5  0.98 113
PPM 175804     05:22:50.3 -01:31:18  7.2  0.49 112
PPM 175808     05:24:01.0 -01:01:08  8.8  0.16 113
523766         05:23:24.4 -01:03:06 14.1       113
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, (2026/12/14 18:36UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1  7.37 109
34Del Ori      05:32:00.4 -00:17:57  2.2  2.61 115
PPM 175822     05:25:36.5 -01:29:29  6.5  0.98 113
PPM 175804     05:21:28.4 -01:32:46  7.2  0.49 112
PPM 175808     05:22:38.8 -01:02:34  8.8  0.16 113
523766         05:22:02.2 -01:04:33 14.1       112
Positions are for J2000

Event circumstances last updated at 2023/11/22 04:20:46 UT

Marc W. Buie, Southwest Research Institute

RECON