RECON: TNO occultation with 09KN30

Event between 09KN30 and star UC4-328-125497 with event index number of 196101

Geocentric closest approach at 2018/08/01 17:16:10 UTC

J2000 position of star is 18:00:54.6 -24:32:20
Equinox of date position of star is 18:01:59.4 -24:32:18
Stellar brightness R=16.5, use SENSEUP=128
Star is 93 degrees from the moon. Moon is 79% illuminated.
TNO apparent brightness V=23.2

TNO is 33.3 AU from the Sun and 32.5 AU from the Earth.
The TNO is moving 16.5 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 364 seconds.
The 1-sigma cross-track error in the shadow position is 1563 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=156.3 km assuming a 5% albedo -- 9.5 sec chord
Diameter=63.8 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is 7:2EEEEE
 
 
 
 
 
 
 
 

Star training set for 09KN30, (2018/08/01 17:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.0 -26:28:18  0.9 20.71 113
Nunki          18:56:25.0 -26:16:19  2.0 12.39  81
4 Sgr          18:00:55.7 -23:48:58  4.8  0.77  93
PPM 267682     18:02:28.7 -24:37:53  8.4  0.13  93
09KN30         18:02:03.0 -24:32:18 16.5        93
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 09KN30, (2018/08/01 17:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.71 113
Nunki          18:55:15.9 -26:17:49  2.0 12.39  81
4 Sgr          17:59:47.6 -23:48:59  4.8  0.77  93
PPM 267682     18:01:20.1 -24:37:56  8.4  0.13  93
09KN30         18:00:54.6 -24:32:20 16.5        93
Positions are for J2000

Event circumstances last updated at 2017/08/02 16:55:29 UT

Marc W. Buie, Southwest Research Institute

RECON