RECON: TNO occultation with 533209

Event between (533209) 14DR143 and star GA0880:04100107 with event index number of 2592355

Geocentric closest approach at 2022/05/31 17:51:31 UTC

J2000 position of star is 12:54:42.4 -00:51:15
Equinox of date position of star is 12:55:50.8 -00:58:27
Stellar brightness G=14.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 109 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=22.7

TNO is 49.2 AU from the Sun and 48.6 AU from the Earth.
The TNO is moving 12.9 km/sec on the sky relative to the star, or, 1.3 arcsec/hr.
The 1-sigma error in the time of the event is 233 seconds.
The 1-sigma cross-track error in the shadow position is 2494 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=436.5 km assuming a 5% albedo -- 33.9 sec chord
Diameter=178.2 km assuming a 30% albedo -- 13.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 533209, (2022/05/31 17:38UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:22.6 -11:16:39  1.0 12.79 120
Vindemiatrix   13:03:17.6 +10:50:21  2.8 11.96 105
38 Vir         12:54:20.1 -03:40:28  6.1  2.73 110
PPM 178912     12:57:35.7 -01:04:34  7.0  0.45 109
PPM 178911     12:57:06.5 -00:56:48  9.5  0.31 109
PPM 178905     12:55:22.1 -00:46:58 11.7  0.23 108
533209         12:55:51.4 -00:58:31 14.7       109
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 533209, (2022/05/31 17:38UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 12.79 120
Vindemiatrix   13:02:10.2 +10:57:33  2.8 11.96 105
38 Vir         12:53:10.8 -03:33:11  6.1  2.73 110
PPM 178912     12:56:26.6 -00:57:19  7.0  0.45 109
PPM 178911     12:55:57.5 -00:49:32  9.5  0.31 109
PPM 178905     12:54:13.1 -00:39:41 11.7  0.23 108
533209         12:54:42.4 -00:51:15 14.7       109
Positions are for J2000

Event circumstances last updated at 2022/03/12 01:41:22 UT

Marc W. Buie, Southwest Research Institute

RECON