RECON: TNO occultation with 469708

Event between (469708) 05GE187 and star GA0800:05327838 with event index number of 153055

Geocentric closest approach at 2018/10/03 13:57:36 UTC

J2000 position of star is 16:38:42.0 -08:55:59
Equinox of date position of star is 16:39:42.3 -08:58:06
Stellar brightness G=15.6, use SENSEUP=128
Star is 133 degrees from the moon. Moon is 37% illuminated.
TNO apparent brightness V=22.0

TNO is 28.1 AU from the Sun and 28.6 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 110 seconds.
The 1-sigma cross-track error in the shadow position is 1136 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 9.4 sec chord
Diameter=85.3 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 469708, (2018/10/03 13:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.6 -26:28:19  0.9 17.64 134
13Zet Oph      16:38:11.6 -10:36:13  2.6  1.68 133
PPM 199862     16:39:49.0 -08:39:17  6.4  0.32 132
PPM 199867     16:40:03.3 -08:49:40  8.9  0.16 133
469708         16:39:43.3 -08:58:08 15.6       133
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 469708, (2018/10/03 13:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.64 134
13Zet Oph      16:37:09.6 -10:34:01  2.6  1.68 133
PPM 199862     16:38:47.7 -08:37:07  6.4  0.32 132
PPM 199867     16:39:02.0 -08:47:30  8.9  0.16 133
469708         16:38:42.0 -08:55:59 15.6       132
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:28:30 UT

Marc W. Buie, Southwest Research Institute

RECON