RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA1260:03009721 with event index number of 2655328

Geocentric closest approach at 2025/01/29 22:42:12 UTC

J2000 position of star is 06:57:41.6 +36:32:18
Equinox of date position of star is 06:59:20.2 +36:30:15
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 145 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=17.8

Object is 8.8 AU from the Sun and 8.0 AU from the Earth.
Apparent velocity is 37.8 km/sec on the sky relative to the star, or, 23.5 arcsec/hr.
The 1-sigma error in the time of the event is 9 seconds.
The 1-sigma cross-track error in the shadow position is 432 km.

The object has an absolute magnitude Hv=8.3
Diameter=128.2 km assuming a 5% albedo -- 3.5 sec chord
Diameter=52.4 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 468861, (2025/01/29 22:42UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:51.0 +27:57:49  1.1 13.16 157
62 Aur         07:00:45.2 +38:00:56  6.0  1.54 145
PPM 072284     07:00:01.6 +36:50:29  8.5  0.36 145
PPM 072267     06:59:00.6 +36:24:59 11.0  0.11 145
468861         06:59:22.7 +36:30:12 14.2       145
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 468861, (2025/01/29 22:42UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 13.16 157
62 Aur         06:59:02.8 +38:03:06  6.0  1.54 145
PPM 072284     06:58:20.2 +36:52:37  8.5  0.36 145
PPM 072267     06:57:19.6 +36:27:05 11.0  0.11 145
468861         06:57:41.6 +36:32:18 14.2       145
Positions are for J2000

Event circumstances last updated at 2024/06/12 03:42:43 UT

Marc W. Buie, Southwest Research Institute

RECON