RECON: TNO occultation with 523715

Event between (523715) 14KU101 and star GA0700:05960997 with event index number of 2331309

Geocentric closest approach at 2025/02/06 19:21:10 UTC

J2000 position of star is 15:47:47.6 -19:28:59
Equinox of date position of star is 15:49:12.6 -19:33:25
Stellar brightness G=13.6, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 170 degrees from the moon. Moon is 66% illuminated.
Apparent brightness V=22.1

Object is 37.4 AU from the Sun and 37.5 AU from the Earth.
Apparent velocity is 11.0 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 182 seconds.
The 1-sigma cross-track error in the shadow position is 1456 km.

The object has an absolute magnitude Hv=6.2
Diameter=332.7 km assuming a 5% albedo -- 30.9 sec chord
Diameter=135.8 km assuming a 30% albedo -- 12.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523715, (2025/02/06 19:20UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:57.0 -26:29:08  0.9 11.83 178
8Bet1Sco       16:06:54.0 -19:52:20  2.6  4.17 173
43Kap Lib      15:43:23.9 -19:45:30  4.7  1.39 169
PPM 230764     15:49:17.3 -19:46:42  8.5  0.22 170
523715         15:49:14.8 -19:33:32 13.6       171
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 523715, (2025/02/06 19:20UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.83 178
8Bet1Sco       16:05:26.2 -19:48:20  2.6  4.17 173
43Kap Lib      15:41:56.7 -19:40:46  4.7  1.39 169
PPM 230764     15:47:50.0 -19:42:09  8.5  0.22 170
523715         15:47:47.6 -19:28:59 13.6       170
Positions are for J2000

Event circumstances last updated at 2024/06/12 03:43:05 UT

Marc W. Buie, Southwest Research Institute

RECON