RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA1080:01411058 with event index number of 2655730

Geocentric closest approach at 2026/02/28 01:45:57 UTC

J2000 position of star is 05:50:47.7 +19:46:25
Equinox of date position of star is 05:52:14.7 +19:46:43
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 29 degrees from the moon. Moon is 86% illuminated.
Apparent brightness V=18.4

Object is 9.4 AU from the Sun and 9.0 AU from the Earth.
Apparent velocity is 19.4 km/sec on the sky relative to the star, or, 10.6 arcsec/hr.
The 1-sigma error in the time of the event is 27 seconds.
The 1-sigma cross-track error in the shadow position is 786 km.

The object has an absolute magnitude Hv=8.3
Diameter=128.2 km assuming a 5% albedo -- 6.9 sec chord
Diameter=52.4 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 468861, (2026/02/28 01:44UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:35.3 +07:24:35  0.4 12.41  33
Alnath         05:27:56.9 +28:37:38  1.6 10.45  34
PPM 121513     05:53:56.4 +19:52:20  6.4  0.39  29
PPM 121502     05:53:24.9 +19:31:34  7.1  0.36  29
PPM 121467     05:52:10.4 +19:42:00  9.6  0.09  29
468861         05:52:20.7 +19:46:44 16.7        29
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, (2026/02/28 01:44UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 12.41  33
Alnath         05:26:17.6 +28:36:23  1.6 10.45  34
PPM 121513     05:52:23.4 +19:52:04  6.4  0.39  29
PPM 121502     05:51:52.1 +19:31:17  7.1  0.36  29
PPM 121467     05:50:37.4 +19:41:40  9.6  0.09  29
468861         05:50:47.7 +19:46:25 16.7        29
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:25:34 UT

Marc W. Buie, Southwest Research Institute

RECON