RECON: TNO occultation with 120347

Event between (120347) Salacia and star UC4-566-131252 with event index number of 147941

Geocentric closest approach at 2018/09/04 17:17:36 UTC

J2000 position of star is 23:28:45.2 +23:08:24
Equinox of date position of star is 23:29:36.0 +23:14:00
Stellar brightness R=14.6
Star is 92 degrees from the moon. Moon is 32% illuminated.
TNO apparent brightness V=20.6

TNO is 44.8 AU from the Sun and 43.9 AU from the Earth.
The TNO is moving 23.9 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 220 seconds.
The 1-sigma cross-track error in the shadow position is 3198 km.

The TNO has an absolute magnitude Hv=4.0
Diameter=955.0 km assuming a 5% albedo -- 41.8 sec chord
Diameter=389.9 km assuming a 30% albedo -- 17.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 120347, (2018/09/04 17:18UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:04.2 +45:20:52  1.3 40.42 106
Scheat         23:04:40.9 +28:11:04  2.4  7.49  95
68Ups Peg      23:26:18.8 +23:30:26  4.4  0.82  92
PPM 115529     23:30:01.6 +23:09:03  7.3  0.12  92
120347         23:29:41.2 +23:14:35 14.6        91
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 120347, (2018/09/04 17:18UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 40.42 106
Scheat         23:03:46.7 +28:05:00  2.4  7.49  95
68Ups Peg      23:25:23.0 +23:24:15  4.4  0.82  92
PPM 115529     23:29:05.6 +23:02:52  7.3  0.12  92
120347         23:28:45.2 +23:08:24 14.6        92
Positions are for J2000

Event circumstances last updated at 2016/12/11 17:32:14 UT

Marc W. Buie, Southwest Research Institute

RECON