RECON: TNO occultation with 05JB186

Event between 05JB186 and star UC4-369-081450 with event index number of 186717

Geocentric closest approach at 2019/04/30 15:23:24 UTC

J2000 position of star is 17:07:10.9 -16:15:35
Equinox of date position of star is 17:08:12.9 -16:16:56
Stellar brightness R=14.9, use SENSEUP=128
Star is 94 degrees from the moon. Moon is 18% illuminated.
TNO apparent brightness V=23.6

TNO is 37.3 AU from the Sun and 36.5 AU from the Earth.
The TNO is moving 18.7 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 1118 seconds.
The 1-sigma cross-track error in the shadow position is 5053 km.

The TNO has an absolute magnitude Hv=7.8
Diameter=167.5 km assuming a 5% albedo -- 9.0 sec chord
Diameter=68.4 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 05JB186, (2019/04/30 15:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.7 -26:28:24  0.9 13.44 100
35Eta Oph      17:11:29.3 -15:44:51  2.6  0.94  93
PPM 232651     17:09:22.3 -17:37:59  6.0  1.37  93
PPM 232639     17:08:52.5 -16:07:01  6.9  0.22  94
PPM 232618     17:08:01.4 -16:28:03  9.4  0.19  94
05JB186        17:08:17.7 -16:17:02 14.9        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 05JB186, (2019/04/30 15:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.44 100
35Eta Oph      17:10:22.7 -15:43:29  2.6  0.94  93
PPM 232651     17:08:14.9 -17:36:33  6.0  1.37  93
PPM 232639     17:07:45.8 -16:05:35  6.9  0.22  94
PPM 232618     17:06:54.5 -16:26:35  9.4  0.19  94
05JB186        17:07:10.9 -16:15:35 14.9        94
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:53:31 UT

Marc W. Buie, Southwest Research Institute

RECON