RECON: TNO occultation with 364171

Event between (364171) 06JZ81 and star GA0680:06387866 with event index number of 2362426

Geocentric closest approach at 2022/01/23 20:21:41 UTC

J2000 position of star is 15:39:58.9 -20:46:58
Equinox of date position of star is 15:41:15.5 -20:51:09
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 46 degrees from the moon. Moon is 68% illuminated.
TNO apparent brightness V=23.2

TNO is 41.2 AU from the Sun and 41.6 AU from the Earth.
The TNO is moving 17.3 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 221 seconds.
The 1-sigma cross-track error in the shadow position is 2230 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=252.4 km assuming a 5% albedo -- 14.6 sec chord
Diameter=103.0 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 364171, (2022/01/23 20:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:45.8 -26:28:45  0.9 12.64  58
7Del Sco       16:01:38.5 -22:40:58  2.3  5.07  51
PPM 264480     15:39:33.5 -21:05:15  5.9  0.46  45
PPM 264518     15:40:57.2 -21:05:18  8.3  0.25  46
PPM 264538     15:41:39.9 -21:02:31  9.5  0.21  46
364171         15:41:16.0 -20:51:11 16.1        46
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 364171, (2022/01/23 20:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.64  58
7Del Sco       16:00:20.0 -22:37:19  2.3  5.07  51
PPM 264480     15:38:16.4 -21:01:00  5.9  0.46  45
PPM 264518     15:39:40.1 -21:01:04  8.3  0.25  46
PPM 264538     15:40:22.7 -20:58:19  9.5  0.21  46
364171         15:39:58.9 -20:46:58 16.1        46
Positions are for J2000

Event circumstances last updated at 2021/12/05 02:02:33 UT

Marc W. Buie, Southwest Research Institute

RECON