RECON: TNO occultation with 472235

Event between (472235) 14GE45 and star UC4-390-059743 with event index number of 185608

Geocentric closest approach at 2019/04/06 14:16:00 UTC

J2000 position of star is 13:50:18.5 -12:11:10
Equinox of date position of star is 13:51:13.9 -12:16:16
Stellar brightness R=16.0, use SENSEUP=128
Star is 174 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=21.6

TNO is 33.5 AU from the Sun and 32.6 AU from the Earth.
The TNO is moving 22.8 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 108 seconds.
The 1-sigma cross-track error in the shadow position is 1634 km.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 13.9 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 472235, (2019/04/06 14:16UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:12.6 -11:15:41  1.0  6.23 170
86 Vir         13:46:58.1 -12:31:20  5.1  1.09 173
PPM 227894     13:50:46.8 -12:38:47  7.8  0.39 174
PPM 227917     13:51:55.3 -12:20:31  9.7  0.15 174
472235         13:51:20.4 -12:16:52 16.0       174
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 472235, (2019/04/06 14:16UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  6.23 170
86 Vir         13:45:56.3 -12:25:35  5.1  1.09 173
PPM 227894     13:49:44.9 -12:33:05  7.8  0.39 174
PPM 227917     13:50:53.5 -12:14:50  9.7  0.15 174
472235         13:50:18.5 -12:11:10 16.0       174
Positions are for J2000

Event circumstances last updated at 2017/04/01 17:00:46 UT

Marc W. Buie, Southwest Research Institute

RECON