RECON: TNO occultation with 469362

Event between (469362) 01KB77 and star UC4-389-073214 with event index number of 149877

Geocentric closest approach at 2018/06/10 21:50:26 UTC

J2000 position of star is 17:12:19.7 -12:15:52
Equinox of date position of star is 17:13:15.7 -12:17:00
Stellar brightness R=16.2
Star is 142 degrees from the moon. Moon is 12% illuminated.
TNO apparent brightness V=21.9

TNO is 28.6 AU from the Sun and 27.6 AU from the Earth.
The TNO is moving 23.3 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 95 seconds.
The 1-sigma cross-track error in the shadow position is 1054 km.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 8.6 sec chord
Diameter=81.5 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 469362, (2018/06/10 21:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.5 -26:28:17  0.9 17.39 149
35Eta Oph      17:11:26.2 -15:44:48  2.6  3.49 142
PPM 232685     17:10:49.2 -10:32:45  5.6  1.85 143
PPM 232706     17:11:45.5 -12:43:23  7.0  0.59 142
PPM 232745     17:13:14.2 -12:35:47  9.4  0.31 142
469362         17:13:21.7 -12:17:08 16.2       142
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 469362, (2018/06/10 21:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 17.39 149
35Eta Oph      17:10:22.7 -15:43:29  2.6  3.49 142
PPM 232685     17:09:48.0 -10:31:26  5.6  1.85 143
PPM 232706     17:10:43.4 -12:42:05  7.0  0.59 142
PPM 232745     17:12:12.1 -12:34:31  9.4  0.31 142
469362         17:12:19.7 -12:15:52 16.2       142
Positions are for J2000

Event circumstances last updated at 2016/09/01 18:27:54 UT

Marc W. Buie, Southwest Research Institute

RECON