RECON: TNO occultation with 09KN30

Event between 09KN30 and star UC4-329-129733 with event index number of 196457

Geocentric closest approach at 2019/06/07 20:57:09 UTC

J2000 position of star is 18:16:14.2 -24:20:25
Equinox of date position of star is 18:17:20.2 -24:19:58
Stellar brightness R=16.2, use SENSEUP=128
Star is 138 degrees from the moon. Moon is 24% illuminated.
TNO apparent brightness V=23.2

TNO is 33.6 AU from the Sun and 32.6 AU from the Earth.
The TNO is moving 21.9 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 357 seconds.
The 1-sigma cross-track error in the shadow position is 1445 km.

The TNO has an absolute magnitude Hv=7.9
Diameter=156.3 km assuming a 5% albedo -- 7.1 sec chord
Diameter=63.8 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is 7:2EEEEE
 
 
 
 
 
 
 
 

Star training set for 09KN30, (2019/06/07 20:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:25  0.9 24.18 115
Nunki          18:56:28.1 -26:16:15  2.0  9.03 147
11 Sgr         18:12:54.5 -23:41:44  4.5  1.21 137
PPM 268162     18:17:45.5 -23:53:41  8.1  0.44 139
PPM 268167     18:17:54.8 -24:00:06  8.7  0.35 139
09KN30         18:17:25.7 -24:19:56 16.2       139
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, (2019/06/07 20:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 24.18 115
Nunki          18:55:15.9 -26:17:49  2.0  9.03 147
11 Sgr         18:11:43.4 -23:42:05  4.5  1.21 137
PPM 268162     18:16:34.3 -23:54:10  8.1  0.44 139
PPM 268167     18:16:43.5 -24:00:35  8.7  0.35 139
09KN30         18:16:14.2 -24:20:25 16.2       138
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:00:49 UT

Marc W. Buie, Southwest Research Institute

RECON