RECON: TNO occultation with 612524

Event between (612524) 02VD130 and star GA1140:03108885 with event index number of 2814293

Geocentric closest approach at 2026/09/22 03:59:14 UTC

J2000 position of star is 07:55:05.5 +24:37:49
Equinox of date position of star is 07:56:29.2 +24:34:04
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 171 degrees from the moon. Moon is 80% illuminated.
Apparent brightness V=22.7

Object is 33.0 AU from the Sun and 33.4 AU from the Earth.
Apparent velocity is 19.1 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 590 seconds.
The 1-sigma cross-track error in the shadow position is 3010 km.

The object has an absolute magnitude Hv=7.3
Diameter=206.1 km assuming a 5% albedo -- 10.8 sec chord
Diameter=84.1 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is 2:1E+4:2II
 
 
 
 
 
 
 
 

Star training set for 612524, (2026/09/22 04:10UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:57.0 +27:57:34  1.1  4.04 167
2Ome1Cnc       08:02:32.7 +25:19:03  5.8  1.53 171
PPM 098140     07:57:42.2 +23:33:03  6.7  1.03 171
PPM 098137     07:57:38.0 +24:35:35  8.6  0.21 171
612524         07:56:42.0 +24:33:30 16.7       171
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 612524, (2026/09/22 04:10UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  4.04 167
2Ome1Cnc       08:00:55.9 +25:23:34  5.8  1.53 171
PPM 098140     07:56:06.4 +23:37:25  6.7  1.03 171
PPM 098137     07:56:01.5 +24:39:56  8.6  0.21 171
612524         07:55:05.5 +24:37:49 16.7       170
Positions are for J2000

Event circumstances last updated at 2023/03/04 04:12:43 UT

Marc W. Buie, Southwest Research Institute

RECON