RECON: TNO occultation with 05JB186

Event between 05JB186 and star UC4-370-080723 with event index number of 195548

Geocentric closest approach at 2019/07/05 15:38:00 UTC

J2000 position of star is 17:01:32.3 -16:00:29
Equinox of date position of star is 17:02:32.6 -16:01:57
Stellar brightness R=14.4, use SENSEUP=128
Star is 113 degrees from the moon. Moon is 11% illuminated.
TNO apparent brightness V=23.5

TNO is 37.3 AU from the Sun and 36.4 AU from the Earth.
The TNO is moving 21.2 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 971 seconds.
The 1-sigma cross-track error in the shadow position is 3893 km.

The TNO has an absolute magnitude Hv=7.8
Diameter=167.5 km assuming a 5% albedo -- 7.9 sec chord
Diameter=68.4 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 05JB186, (2019/07/05 15:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.4 -26:28:25  0.9 12.83 108
35Eta Oph      17:11:29.9 -15:44:52  2.6  2.14 115
PPM 232348     16:57:09.5 -16:50:09  6.3  1.54 112
PPM 232432     17:00:30.6 -16:05:33  7.9  0.52 113
PPM 232485     17:02:53.0 -15:57:37  9.5  0.09 113
05JB186        17:02:39.6 -16:02:07 14.4       113
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, (2019/07/05 15:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.83 108
35Eta Oph      17:10:22.7 -15:43:29  2.6  2.14 115
PPM 232348     16:56:02.0 -16:48:22  6.3  1.54 112
PPM 232432     16:59:23.3 -16:03:52  7.9  0.52 113
PPM 232485     17:01:45.8 -15:55:59  9.5  0.09 113
05JB186        17:01:32.3 -16:00:29 14.4       113
Positions are for J2000

Event circumstances last updated at 2017/07/01 17:51:00 UT

Marc W. Buie, Southwest Research Institute

RECON