RECON: TNO occultation with 523770

Event between (523770) 14XO40 and star GA0840:04929258 with event index number of 2612458

Geocentric closest approach at 2028/06/12 19:55:39 UTC

J2000 position of star is 16:19:42.7 -04:48:31
Equinox of date position of star is 16:21:00.5 -04:51:57
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 82 degrees from the moon. Moon is 72% illuminated.
Apparent brightness V=20.1

Object is 16.3 AU from the Sun and 15.4 AU from the Earth.
Apparent velocity is 19.1 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 134 seconds.
The 1-sigma cross-track error in the shadow position is 1003 km.

The object has an absolute magnitude Hv=7.9
Diameter=153.5 km assuming a 5% albedo -- 8.1 sec chord
Diameter=62.7 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523770, (2028/06/12 19:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.4 -26:29:33  0.9 21.75  77
1Del Oph       16:15:50.4 -03:45:55  2.7  1.74  84
2Eps Oph       16:19:49.7 -04:45:35  3.2  0.36  83
PPM 199550     16:21:46.1 -04:37:27  8.5  0.29  82
PPM 199527     16:20:37.9 -04:52:49  9.4  0.15  82
523770         16:21:13.1 -04:52:30 15.8        82
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 523770, (2028/06/12 19:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.75  77
1Del Oph       16:14:20.7 -03:41:43  2.7  1.74  84
2Eps Oph       16:18:19.4 -04:41:32  3.2  0.36  83
PPM 199550     16:20:15.9 -04:33:29  8.5  0.29  82
PPM 199527     16:19:07.5 -04:48:48  9.4  0.15  82
523770         16:19:42.7 -04:48:31 15.8        82
Positions are for J2000

Event circumstances last updated at 2024/06/24 21:29:51 UT

Marc W. Buie, Southwest Research Institute

RECON