RECON: TNO occultation with 47932

Event between (47932) 00GN171 and star GA0580:10533941 with event index number of 2313560

Geocentric closest approach at 2022/07/09 19:45:17 UTC

J2000 position of star is 16:39:37.7 -30:30:11
Equinox of date position of star is 16:41:02.4 -30:32:42
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 22 degrees from the moon. Moon is 79% illuminated.
TNO apparent brightness V=20.9

TNO is 29.3 AU from the Sun and 28.5 AU from the Earth.
The TNO is moving 18.0 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 163 seconds.
The 1-sigma cross-track error in the shadow position is 1727 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 19.2 sec chord
Diameter=141.6 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 47932, (2022/07/09 19:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.5 -26:28:48  0.9  4.65  18
23Tau Sco      16:37:17.3 -28:15:39  2.8  2.43  20
PPM 265803     16:43:01.9 -27:51:06  6.5  2.73  21
PPM 295319     16:40:46.6 -30:30:27  7.7  0.07  22
47932          16:41:03.6 -30:32:44 16.6        22
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, (2022/07/09 19:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  4.65  18
23Tau Sco      16:35:52.9 -28:12:58  2.8  2.43  20
PPM 265803     16:41:37.6 -27:48:35  6.5  2.73  21
PPM 295319     16:39:20.7 -30:27:53  7.7  0.07  22
47932          16:39:37.7 -30:30:11 16.6        22
Positions are for J2000

Event circumstances last updated at 2022/03/15 01:06:09 UT

Marc W. Buie, Southwest Research Institute

RECON