RECON: TNO occultation with 12TC324

Event between 12TC324 and star GA0960:00260107 with event index number of 2160606

Geocentric closest approach at 2022/10/06 01:04:47 UTC

J2000 position of star is 03:03:30.4 +07:01:13
Equinox of date position of star is 03:04:40.3 +07:06:17
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 82 degrees from the moon. Moon is 82% illuminated.
TNO apparent brightness V=22.0

TNO is 34.1 AU from the Sun and 33.3 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 79 seconds.
The 1-sigma cross-track error in the shadow position is 1367 km.

The TNO has an absolute magnitude Hv=6.6
Diameter=289.7 km assuming a 5% albedo -- 14.7 sec chord
Diameter=118.3 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 
 
 

Star training set for 12TC324, (2022/10/06 01:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:13.8 +16:33:12  0.8 24.49 106
Menkar         03:03:28.3 +04:10:40  2.5  2.95  80
PPM 146189     03:04:40.6 +06:18:51  6.3  0.79  81
PPM 146197     03:05:10.5 +07:22:10  7.9  0.28  82
PPM 146180     03:03:55.1 +07:09:18  9.8  0.20  82
12TC324        03:04:43.2 +07:06:30 16.5        82
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 12TC324, (2022/10/06 01:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 24.49 106
Menkar         03:02:16.8 +04:05:21  2.5  2.95  80
PPM 146189     03:03:28.2 +06:13:34  6.3  0.79  81
PPM 146197     03:03:57.6 +07:16:54  7.9  0.28  82
PPM 146180     03:02:42.4 +07:04:00  9.8  0.20  82
12TC324        03:03:30.4 +07:01:13 16.5        82
Positions are for J2000

Event circumstances last updated at 2021/11/16 00:38:03 UT

Marc W. Buie, Southwest Research Institute

RECON