RECON: TNO occultation with 613469

Event between (613469) 06QJ181 and star GA1000:02407840 with event index number of 2809952

Geocentric closest approach at 2026/01/10 01:04:37 UTC

J2000 position of star is 06:52:06.1 +11:06:06
Equinox of date position of star is 06:53:20.5 +11:04:24
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 89 degrees from the moon. Moon is 56% illuminated.
TNO apparent brightness V=22.1

TNO is 31.6 AU from the Sun and 30.7 AU from the Earth.
The TNO is moving 23.9 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 184 seconds.
The 1-sigma cross-track error in the shadow position is 2044 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=231.2 km assuming a 5% albedo -- 9.7 sec chord
Diameter=94.4 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is 3:1EE+3:1II
 
 
 
 
 
 
 
 

Star training set for 613469, (2026/01/10 01:05UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:34.9 +07:24:35  0.4 14.52 103
Alhena         06:39:12.9 +16:22:29  1.9  6.35  93
PPM 151572     06:57:51.7 +09:55:14  5.9  1.56  88
PPM 123182     06:53:45.8 +11:17:08  7.6  0.22  89
613469         06:53:32.8 +11:04:07 15.3        89
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 613469, (2026/01/10 01:05UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.52 103
Alhena         06:37:42.8 +16:23:56  1.9  6.35  93
PPM 151572     06:56:25.8 +09:57:23  5.9  1.56  88
PPM 123182     06:52:19.0 +11:19:07  7.6  0.22  89
613469         06:52:06.1 +11:06:06 15.3        89
Positions are for J2000

Event circumstances last updated at 2022/05/04 23:16:54 UT

Marc W. Buie, Southwest Research Institute

RECON