RECON: TNO occultation with 463368

Event between (463368) 12VU85 and star GA1060:01859196 with event index number of 2278540

Geocentric closest approach at 2021/12/01 02:58:01 UTC

J2000 position of star is 06:22:49.4 +17:23:20
Equinox of date position of star is 06:24:05.0 +17:22:35
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 109 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=21.0

TNO is 23.1 AU from the Sun and 22.2 AU from the Earth.
The TNO is moving 20.9 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 217 seconds.
The 1-sigma cross-track error in the shadow position is 1600 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 10.0 sec chord
Diameter=85.3 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 463368, (2021/12/01 02:58UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:21.5 +07:24:34  0.4 12.05 116
Alhena         06:38:58.7 +16:22:43  1.9  3.70 106
PPM 122270     06:20:18.3 +17:18:53  6.1  0.91 110
PPM 122382     06:24:36.6 +17:22:49  8.0  0.12 109
463368         06:24:05.9 +17:22:35 14.1       109
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, (2021/12/01 02:58UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 12.05 116
Alhena         06:37:42.8 +16:23:57  1.9  3.70 106
PPM 122270     06:19:01.8 +17:19:31  6.1  0.91 110
PPM 122382     06:23:20.1 +17:23:34  8.0  0.12 109
463368         06:22:49.4 +17:23:20 14.1       109
Positions are for J2000

Event circumstances last updated at 2021/08/29 01:45:29 UT

Marc W. Buie, Southwest Research Institute

RECON