RECON: TNO occultation with 05GF187

Event between 05GF187 and star GA0700:07783923 with event index number of 271339

Geocentric closest approach at 2020/06/12 19:38:58 UTC

J2000 position of star is 17:04:31.7 -19:37:56
Equinox of date position of star is 17:05:43.1 -19:39:32
Stellar brightness G=13.4, use SENSEUP=32
Star is 91 degrees from the moon. Moon is 54% illuminated.
TNO apparent brightness V=24.6

TNO is 29.4 AU from the Sun and 28.4 AU from the Earth.
The TNO is moving 23.1 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 234 seconds.
The 1-sigma cross-track error in the shadow position is 1684 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=144.5 km assuming a 5% albedo -- 2.6 sec chord
Diameter=59.0 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 05GF187, (2020/06/12 19:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.9 -26:28:32  0.9 10.55  97
35Eta Oph      17:11:33.1 -15:44:56  2.6  4.15  90
PPM 266364     17:05:58.2 -20:31:18  6.5  0.86  90
PPM 232540     17:04:48.6 -19:29:23  8.2  0.28  91
PPM 232567     17:05:45.2 -19:41:50  9.4  0.04  91
05GF187        17:05:44.0 -19:39:33 13.4        90
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 05GF187, (2020/06/12 19:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.55  97
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.15  90
PPM 266364     17:04:45.3 -20:29:41  6.5  0.86  90
PPM 232540     17:03:36.3 -19:27:44  8.2  0.28  91
PPM 232567     17:04:32.8 -19:40:13  9.4  0.04  91
05GF187        17:04:31.7 -19:37:56 13.4        91
Positions are for J2000

Event circumstances last updated at 2020/03/09 21:15:45 UT

Marc W. Buie, Southwest Research Institute

RECON