RECON: TNO occultation with 523703

Event between (523703) 14HX199 and star GA0760:06154948 with event index number of 2333231

Geocentric closest approach at 2025/02/04 14:52:20 UTC

J2000 position of star is 16:52:10.5 -13:20:50
Equinox of date position of star is 16:53:29.6 -13:23:06
Stellar brightness G=11.0, use SENSEUP=4 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 142 degrees from the moon. Moon is 42% illuminated.
Apparent brightness V=22.3

Object is 30.7 AU from the Sun and 31.1 AU from the Earth.
Apparent velocity is 20.3 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 111 seconds.
The 1-sigma cross-track error in the shadow position is 1307 km.

The object has an absolute magnitude Hv=7.2
Diameter=221.8 km assuming a 5% albedo -- 11.1 sec chord
Diameter=90.6 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523703, (2025/02/04 14:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:57.0 -26:29:08  0.9 14.13 147
13Zet Oph      16:38:32.6 -10:36:57  2.6  4.61 144
PPM 232182     16:49:52.7 -14:57:07  6.2  1.80 143
PPM 232252     16:53:40.3 -14:24:39  8.3  1.02 142
PPM 232241     16:53:07.4 -13:29:27  9.3  0.15 142
523703         16:53:35.3 -13:23:15 11.0       141
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 523703, (2025/02/04 14:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.13 147
13Zet Oph      16:37:09.6 -10:34:01  2.6  4.61 144
PPM 232182     16:48:27.0 -14:54:34  6.2  1.80 143
PPM 232252     16:52:14.9 -14:22:14  8.3  1.02 142
PPM 232241     16:51:42.6 -13:27:00  9.3  0.15 142
523703         16:52:10.5 -13:20:50 11.0       141
Positions are for J2000

Event circumstances last updated at 2023/05/28 03:49:59 UT

Marc W. Buie, Southwest Research Institute

RECON