RECON: TNO occultation with 523681

Event between (523681) 14BV64 and star GA0840:03943147 with event index number of 2624642

Geocentric closest approach at 2026/11/04 22:42:56 UTC

J2000 position of star is 10:36:21.4 -05:54:38
Equinox of date position of star is 10:37:35.0 -06:02:14
Stellar brightness G=11.2, use SENSEUP=8 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 14 degrees from the moon. Moon is 19% illuminated.
Apparent brightness V=21.5

Object is 46.4 AU from the Sun and 46.9 AU from the Earth.
Apparent velocity is 20.4 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 106 seconds.
The 1-sigma cross-track error in the shadow position is 2280 km.

The object has an absolute magnitude Hv=4.7
Diameter=682.4 km assuming a 5% albedo -- 33.6 sec chord
Diameter=278.6 km assuming a 30% albedo -- 13.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 523681, (2026/11/04 22:44UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:48.0 +11:50:06  1.3 19.18  22
Alphard        09:28:54.4 -08:46:35  2.0 17.27  31
PPM 193503     10:32:19.4 -07:46:34  6.2  2.18  16
PPM 193574     10:36:46.6 -05:30:05  7.9  0.60  14
PPM 193593     10:37:48.6 -05:58:29  9.2  0.08  14
523681         10:37:42.6 -06:03:01 11.2        14
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 523681, (2026/11/04 22:44UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 19.18  22
Alphard        09:27:35.2 -08:39:30  2.0 17.27  31
PPM 193503     10:30:58.7 -07:38:15  6.2  2.18  16
PPM 193574     10:35:25.3 -05:21:43  7.9  0.60  14
PPM 193593     10:36:27.4 -05:50:06  9.2  0.08  14
523681         10:36:21.4 -05:54:38 11.2        14
Positions are for J2000

Event circumstances last updated at 2024/04/23 03:25:05 UT

Marc W. Buie, Southwest Research Institute

RECON