RECON: TNO occultation with 09KN30

Event between 09KN30 and star GA0640:25717596 with event index number of 196460

Geocentric closest approach at 2019/06/08 19:00:44 UTC

J2000 position of star is 18:16:08.9 -24:20:26
Equinox of date position of star is 18:17:17.7 -24:19:59
Stellar brightness G=15.3, use SENSEUP=128
Star is 125 degrees from the moon. Moon is 34% 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 22.0 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 323 seconds.
The 1-sigma cross-track error in the shadow position is 1755 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, (2019/06/08 19:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:25  0.9 24.16 102
Nunki          18:56:28.1 -26:16:15  2.0  9.05 134
11 Sgr         18:12:54.6 -23:41:44  4.5  1.20 124
PPM 268162     18:17:45.5 -23:53:41  8.1  0.45 125
PPM 268167     18:17:54.8 -24:00:06  8.7  0.36 125
09KN30         18:17:20.3 -24:19:58 15.3       126
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, (2019/06/08 19:01UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 24.16 102
Nunki          18:55:15.9 -26:17:49  2.0  9.05 134
11 Sgr         18:11:43.4 -23:42:05  4.5  1.20 124
PPM 268162     18:16:34.3 -23:54:10  8.1  0.45 125
PPM 268167     18:16:43.5 -24:00:35  8.7  0.36 125
09KN30         18:16:08.9 -24:20:26 15.3       125
Positions are for J2000

Event circumstances last updated at 2018/09/24 17:47:40 UT

Marc W. Buie, Southwest Research Institute

RECON