RECON: TNO occultation with 472232

Event between (472232) 14FW71 and star UC4-365-062637 with event index number of 150584

Geocentric closest approach at 2018/01/09 00:27:59 UTC

J2000 position of star is 12:50:18.3 -17:09:46
Equinox of date position of star is 12:51:13.3 -17:15:26
Stellar brightness R=16.5, use SENSEUP=128
Star is 16 degrees from the moon. Moon is 49% illuminated.
TNO apparent brightness V=22.3

TNO is 42.8 AU from the Sun and 42.7 AU from the Earth.
The TNO is moving 6.7 km/sec on the sky relative to the star, or, 0.8 arcsec/hr.
The 1-sigma error in the time of the event is 309 seconds.
The 1-sigma cross-track error in the shadow position is 5523 km.

The TNO has an absolute magnitude Hv=5.8
Diameter=416.9 km assuming a 5% albedo -- 62.1 sec chord
Diameter=170.2 km assuming a 30% albedo -- 25.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 472232, (2018/01/09 00:28UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:08.7 -11:15:17  1.0 10.37   8
9Bet Crv       12:35:20.2 -23:29:46  2.6  7.26  23
PPM 226546     12:56:50.3 -15:25:27  6.2  2.27  13
PPM 226401     12:50:24.0 -17:14:38  8.5  0.20  16
472232         12:51:15.4 -17:15:39 16.5        16
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 472232, (2018/01/09 00:28UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 10.37   8
9Bet Crv       12:34:23.2 -23:23:49  2.6  7.26  23
PPM 226546     12:55:53.2 -15:19:37  6.2  2.27  13
PPM 226401     12:49:27.0 -17:08:45  8.5  0.20  16
472232         12:50:18.3 -17:09:46 16.5        16
Positions are for J2000

Event circumstances last updated at 2017/05/17 17:59:07 UT

Marc W. Buie, Southwest Research Institute

RECON