RECON: TNO occultation with 523740

Event between (523740) 14TV85 and star GA0700:05180665 with event index number of 2324349

Geocentric closest approach at 2026/05/31 14:14:05 UTC

J2000 position of star is 13:12:13.7 -18:24:50
Equinox of date position of star is 13:13:32.4 -18:32:36
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 49 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=21.5

Object is 15.5 AU from the Sun and 14.8 AU from the Earth.
Apparent velocity is 13.0 km/sec on the sky relative to the star, or, 4.4 arcsec/hr.
The 1-sigma error in the time of the event is 56 seconds.
The 1-sigma cross-track error in the shadow position is 736 km.

The object has an absolute magnitude Hv=9.4
Diameter=77.3 km assuming a 5% albedo -- 6.1 sec chord
Diameter=31.5 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523740, (2026/05/31 14:13UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:35.3 -11:17:54  1.0  7.90  49
54 Vir         13:14:52.0 -18:57:54  6.1  0.50  48
PPM 226940     13:13:35.5 -18:32:27  9.5  0.02  49
523740         13:13:38.6 -18:33:13 16.7        48
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 523740, (2026/05/31 14:13UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  7.90  49
54 Vir         13:13:26.9 -18:49:32  6.1  0.50  48
PPM 226940     13:12:10.6 -18:24:05  9.5  0.02  49
523740         13:12:13.7 -18:24:50 16.7        49
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:25:26 UT

Marc W. Buie, Southwest Research Institute

RECON