RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star UC4-353-072429 with event index number of 148070

Geocentric closest approach at 2017/09/05 20:44:29 UTC

J2000 position of star is 15:00:17.4 -19:29:34
Equinox of date position of star is 15:01:16.7 -19:33:40
Stellar brightness R=16.5, use SENSEUP=128
Star is 110 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=21.2

TNO is 19.9 AU from the Sun and 20.3 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 71 seconds.
The 1-sigma cross-track error in the shadow position is 975 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=158.5 km assuming a 5% albedo -- 8.0 sec chord
Diameter=64.7 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 469442, (2017/09/05 20:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:29.6 -26:28:11  0.9 21.62  88
27Bet Lib      15:17:57.6 -09:26:50  2.6 10.89 109
PPM 229408     14:52:51.0 -18:25:38  6.2  2.30 112
PPM 229600     15:00:43.6 -19:22:29  8.2  0.23 110
PPM 229597     15:00:38.4 -19:42:38  9.7  0.21 110
469442         15:01:17.8 -19:33:44 16.5       110
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 469442, (2017/09/05 20:44UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.62  88
27Bet Lib      15:17:00.3 -09:22:59  2.6 10.89 109
PPM 229408     14:51:51.3 -18:21:19  6.2  2.30 112
PPM 229600     14:59:43.4 -19:18:18  8.2  0.23 110
PPM 229597     14:59:38.1 -19:38:28  9.7  0.21 110
469442         15:00:17.4 -19:29:34 16.5       110
Positions are for J2000

Event circumstances last updated at 2017/05/16 18:32:29 UT

Marc W. Buie, Southwest Research Institute

RECON