RECON: TNO occultation with 463368

Event between (463368) 12VU85 and star GA1060:02123837 with event index number of 2278726

Geocentric closest approach at 2022/12/20 18:29:23 UTC

J2000 position of star is 06:34:50.3 +16:17:44
Equinox of date position of star is 06:36:09.0 +16:16:34
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 133 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=20.8

TNO is 22.8 AU from the Sun and 21.8 AU from the Earth.
The TNO is moving 23.4 km/sec on the sky relative to the star, or, 5.3 arcsec/hr.
The 1-sigma error in the time of the event is 249 seconds.
The 1-sigma cross-track error in the shadow position is 1963 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 8.9 sec chord
Diameter=85.3 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 463368, (2022/12/20 18:29UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:25.0 +07:24:34  0.4 13.15 140
Alhena         06:39:02.3 +16:22:40  1.9  0.70 133
PPM 122879     06:42:41.4 +16:22:27  5.9  1.57 132
PPM 122706     06:36:05.8 +16:21:43  7.9  0.09 133
463368         06:36:09.8 +16:16:33 16.8       133
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 463368, (2022/12/20 18:29UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 13.15 140
Alhena         06:37:42.8 +16:23:57  1.9  0.70 133
PPM 122879     06:41:21.9 +16:23:51  5.9  1.57 132
PPM 122706     06:34:46.3 +16:22:54  7.9  0.09 133
463368         06:34:50.3 +16:17:44 16.8       133
Positions are for J2000

Event circumstances last updated at 2022/10/02 04:11:39 UT

Marc W. Buie, Southwest Research Institute

RECON