RECON: TNO occultation with 10199

Event between (10199) Chariklo and star UC4-308-259940 with event index number of 130754

Geocentric closest approach at 2018/07/17 22:41:59 UTC

J2000 position of star is 19:13:57.2 -28:35:37
Equinox of date position of star is 19:15:04.7 -28:33:42
Stellar brightness R=13.9, use SENSEUP=64
Star is 105 degrees from the moon. Moon is 30% illuminated.
TNO apparent brightness V=18.6

TNO is 15.9 AU from the Sun and 14.9 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 7.4 arcsec/hr.
The 1-sigma error in the time of the event is 82 seconds.
The 1-sigma cross-track error in the shadow position is 1142 km.

The TNO has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 12.9 sec chord
Diameter=117.7 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10199, (2018/07/17 22:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.8 -26:28:18  0.9 36.37  69
38Zet Sgr      19:03:47.4 -29:51:07  2.7  2.79 102
40Tau Sgr      19:08:05.8 -27:38:30  3.3  1.80 103
PPM 269561     19:17:58.7 -28:37:58  7.8  0.63 106
PPM 269505     19:15:35.6 -28:38:28  9.7  0.13 105
10199          19:15:07.0 -28:33:38 13.9       105
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 10199, (2018/07/17 22:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 36.37  69
38Zet Sgr      19:02:36.7 -29:52:49  2.7  2.79 102
40Tau Sgr      19:06:56.3 -27:40:18  3.3  1.80 103
PPM 269561     19:16:48.9 -28:40:01  7.8  0.63 106
PPM 269505     19:14:25.7 -28:40:28  9.7  0.13 105
10199          19:13:57.2 -28:35:37 13.9       105
Positions are for J2000

Event circumstances last updated at 2017/12/05 18:48:34 UT

Marc W. Buie, Southwest Research Institute

RECON