RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0720:23531396 with event index number of 2286525

Geocentric closest approach at 2027/10/12 04:27:45 UTC

J2000 position of star is 18:30:37.2 -16:54:28
Equinox of date position of star is 18:32:02.3 -16:53:21
Stellar brightness G=10.3, use SENSEUP=4 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 62 degrees from the moon. Moon is 89% illuminated.
Apparent brightness V=20.5

Object is 11.4 AU from the Sun and 11.6 AU from the Earth.
Apparent velocity is 14.6 km/sec on the sky relative to the star, or, 6.2 arcsec/hr.
The 1-sigma error in the time of the event is 77 seconds.
The 1-sigma cross-track error in the shadow position is 648 km.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 5.2 sec chord
Diameter=28.9 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 459865, (2027/10/12 04:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.9 -26:29:28  0.9 29.64  90
Nunki          18:56:59.1 -26:15:35  2.0 10.99  58
PPM 234652     18:33:03.9 -18:22:52  5.0  1.51  62
PPM 234690     18:34:38.4 -16:32:15  7.3  0.67  62
PPM 234613     18:31:27.2 -16:41:39  9.4  0.27  62
459865         18:32:13.8 -16:53:11 10.3        62
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, (2027/10/12 04:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.64  90
Nunki          18:55:15.9 -26:17:50  2.0 10.99  58
PPM 234652     18:31:26.3 -18:24:10  5.0  1.51  62
PPM 234690     18:33:02.1 -16:33:37  7.3  0.67  62
PPM 234613     18:29:50.8 -16:42:53  9.4  0.27  62
459865         18:30:37.2 -16:54:28 10.3        62
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:28:55 UT

Marc W. Buie, Southwest Research Institute

RECON