RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0620:16847192 with event index number of 2282640

Geocentric closest approach at 2025/04/26 15:43:47 UTC

J2000 position of star is 17:22:17.0 -27:16:05
Equinox of date position of star is 17:23:48.8 -27:17:23
Stellar brightness G=11.1, use SENSEUP=8 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 119 degrees from the moon. Moon is 2% illuminated.
Apparent brightness V=19.6

Object is 9.8 AU from the Sun and 9.1 AU from the Earth.
Apparent velocity is 11.5 km/sec on the sky relative to the star, or, 6.3 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 416 km.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 6.6 sec chord
Diameter=28.9 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2025/04/26 15:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:57.8 -26:29:09  0.9 11.82 130
26Eps Sco      16:51:48.6 -34:20:12  2.3  9.84 124
43 Oph         17:24:57.3 -28:09:54  5.1  0.91 118
PPM 266726     17:22:40.8 -27:26:29  7.6  0.30 119
459865         17:23:52.0 -27:17:26 11.1       118
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 459865, (2025/04/26 15:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.82 130
26Eps Sco      16:50:08.7 -34:17:42  2.3  9.84 124
43 Oph         17:23:21.6 -28:08:35  5.1  0.91 118
PPM 266726     17:21:05.6 -27:25:05  7.6  0.30 119
459865         17:22:17.0 -27:16:05 11.1       119
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:45:52 UT

Marc W. Buie, Southwest Research Institute

RECON