RECON: TNO occultation with 523720

Event between (523720) 14LN28 and star GA0960:00089991 with event index number of 2615709

Geocentric closest approach at 2026/10/29 13:58:45 UTC

J2000 position of star is 01:00:15.4 +06:22:44
Equinox of date position of star is 01:01:29.8 +06:30:26
Stellar brightness G=12.8, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 66 degrees from the moon. Moon is 84% illuminated.
Apparent brightness V=20.5

Object is 16.7 AU from the Sun and 15.7 AU from the Earth.
Apparent velocity is 19.3 km/sec on the sky relative to the star, or, 6.1 arcsec/hr.
The 1-sigma error in the time of the event is 58 seconds.
The 1-sigma cross-track error in the shadow position is 859 km.

The object has an absolute magnitude Hv=8.3
Diameter=128.2 km assuming a 5% albedo -- 6.8 sec chord
Diameter=52.4 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523720, (2026/10/29 13:56UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:14:37.2 +15:19:57  2.8 14.51  73
71Eps Psc      01:04:20.4 +08:02:02  4.3  1.65  65
PPM 144137     01:01:13.3 +06:37:39  7.7  0.15  66
PPM 144145     01:01:29.0 +06:26:01  9.8  0.10  66
PPM 144140     01:01:17.8 +06:31:35 11.1  0.09  66
523720         01:01:39.0 +06:31:23 12.8        66
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 523720, (2026/10/29 13:56UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:13:14.2 +15:11:01  2.8 14.51  73
71Eps Psc      01:02:56.5 +07:53:25  4.3  1.65  65
PPM 144137     00:59:49.7 +06:29:00  7.7  0.15  66
PPM 144145     01:00:05.5 +06:17:22  9.8  0.10  66
PPM 144140     00:59:54.2 +06:22:56 11.1  0.09  66
523720         01:00:15.4 +06:22:44 12.8        66
Positions are for J2000

Event circumstances last updated at 2023/11/21 04:34:10 UT

Marc W. Buie, Southwest Research Institute

RECON