RECON: TNO occultation with 386968

Event between (386968) 12BR61 and star GA0680:06508481 with event index number of 2211944

Geocentric closest approach at 2022/04/12 23:08:14 UTC

J2000 position of star is 15:51:27.4 -21:22:36
Equinox of date position of star is 15:52:45.6 -21:26:32
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 86 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=20.8

TNO is 13.5 AU from the Sun and 12.7 AU from the Earth.
The TNO is moving 14.3 km/sec on the sky relative to the star, or, 5.6 arcsec/hr.
The 1-sigma error in the time of the event is 40 seconds.
The 1-sigma cross-track error in the shadow position is 476 km.

The TNO has an absolute magnitude Hv=9.4
Diameter=81.3 km assuming a 5% albedo -- 5.7 sec chord
Diameter=33.2 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 386968, (2022/04/12 23:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.6 -26:28:46  0.9 10.03  95
7Del Sco       16:01:39.3 -22:41:00  2.3  2.40  88
45Lam Lib      15:54:37.9 -20:13:55  5.0  1.29  86
PPM 264743     15:51:15.0 -21:33:26  7.9  0.37  85
PPM 264793     15:53:27.7 -21:44:55  8.6  0.35  86
386968         15:52:45.9 -21:26:33 14.6        86
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 386968, (2022/04/12 23:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.03  95
7Del Sco       16:00:20.0 -22:37:18  2.3  2.40  88
45Lam Lib      15:53:20.0 -20:10:02  5.0  1.29  86
PPM 264743     15:49:56.6 -21:29:27  7.9  0.37  85
PPM 264793     15:52:09.1 -21:41:00  8.6  0.35  86
386968         15:51:27.4 -21:22:36 14.6        86
Positions are for J2000

Event circumstances last updated at 2022/03/12 01:35:40 UT

Marc W. Buie, Southwest Research Institute

RECON