RECON: TNO occultation with 47932

Event between (47932) 00GN171 and star GA0580:11429868 with event index number of 2313499

Geocentric closest approach at 2022/05/07 17:49:24 UTC

J2000 position of star is 16:47:02.6 -30:40:29
Equinox of date position of star is 16:48:27.6 -30:42:47
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 132 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=20.9

TNO is 29.3 AU from the Sun and 28.4 AU from the Earth.
The TNO is moving 20.2 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 176 seconds.
The 1-sigma cross-track error in the shadow position is 1431 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 17.2 sec chord
Diameter=141.6 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 47932, (2022/05/07 17:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.9 -26:28:47  0.9  5.74 127
23Tau Sco      16:37:16.7 -28:15:38  2.8  3.46 129
PPM 295639     16:56:01.7 -30:37:19  6.5  1.63 133
PPM 295476     16:48:24.1 -31:02:11  8.5  0.32 132
PPM 295470     16:48:03.0 -30:39:36  8.7  0.10 131
47932          16:48:28.1 -30:42:48 16.7       132
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 47932, (2022/05/07 17:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  5.74 127
23Tau Sco      16:35:52.9 -28:12:58  2.8  3.46 129
PPM 295639     16:54:36.0 -30:35:14  6.5  1.63 133
PPM 295476     16:46:58.4 -30:59:52  8.5  0.32 132
PPM 295470     16:46:37.5 -30:37:16  8.7  0.10 131
47932          16:47:02.6 -30:40:29 16.7       131
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:01:45 UT

Marc W. Buie, Southwest Research Institute

RECON