RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0720:24252502 with event index number of 2286624

Geocentric closest approach at 2027/10/22 17:15:16 UTC

J2000 position of star is 18:32:44.5 -16:52:25
Equinox of date position of star is 18:34:09.6 -16:51:14
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 158 degrees from the moon. Moon is 50% illuminated.
Apparent brightness V=20.5

Object is 11.5 AU from the Sun and 11.8 AU from the Earth.
Apparent velocity is 19.5 km/sec on the sky relative to the star, or, 8.2 arcsec/hr.
The 1-sigma error in the time of the event is 58 seconds.
The 1-sigma cross-track error in the shadow position is 646 km.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 3.9 sec chord
Diameter=28.9 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2027/10/22 17:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:07.0 -26:29:28  0.9 30.12 131
Nunki          18:56:59.2 -26:15:34  2.0 10.78 163
PPM 234652     18:33:04.0 -18:22:52  5.0  1.56 158
PPM 234690     18:34:38.5 -16:32:15  7.3  0.32 158
PPM 234694     18:34:47.6 -16:49:48  8.7  0.11 158
459865         18:34:21.1 -16:51:04 15.7       158
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, (2027/10/22 17:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.12 131
Nunki          18:55:15.9 -26:17:49  2.0 10.78 163
PPM 234652     18:31:26.3 -18:24:10  5.0  1.56 158
PPM 234690     18:33:02.1 -16:33:37  7.3  0.32 158
PPM 234694     18:33:10.9 -16:51:10  8.7  0.11 158
459865         18:32:44.5 -16:52:25 15.7       158
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:29:04 UT

Marc W. Buie, Southwest Research Institute

RECON