RECON: TNO occultation with 04HX78

Event between 04HX78 and star UC4-379-079662 with event index number of 125810

Geocentric closest approach at 2018/07/08 19:10:10 UTC

J2000 position of star is 17:14:48.5 -14:16:42
Equinox of date position of star is 17:15:44.8 -14:17:46
Stellar brightness R=16.0
Star is 148 degrees from the moon. Moon is 25% illuminated.
TNO apparent brightness V=23.4

TNO is 33.5 AU from the Sun and 32.6 AU from the Earth.
The TNO is moving 20.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 588 seconds.
The 1-sigma cross-track error in the shadow position is 2616 km.

The TNO has an absolute magnitude Hv=8.1
Diameter=143.9 km assuming a 5% albedo -- 7.0 sec chord
Diameter=58.7 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 04HX78, (2018/07/08 19:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.7 -26:28:18  0.9 16.13 155
35Eta Oph      17:11:26.5 -15:44:48  2.6  1.80 149
PPM 232829     17:16:23.5 -14:36:14  5.9  0.33 148
PPM 232827     17:16:16.5 -14:27:16  8.4  0.19 148
PPM 232819     17:15:51.2 -14:17:40  9.4  0.00 148
04HX78         17:15:51.7 -14:17:54 16.0       148
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 04HX78, (2018/07/08 19:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 16.13 155
35Eta Oph      17:10:22.7 -15:43:29  2.6  1.80 149
PPM 232829     17:15:20.3 -14:35:03  5.9  0.33 148
PPM 232827     17:15:13.3 -14:26:05  8.4  0.19 148
PPM 232819     17:14:48.1 -14:16:29  9.4  0.00 148
04HX78         17:14:48.5 -14:16:42 16.0       148
Positions are for J2000

Event circumstances last updated at 2016/07/01 17:43:35 UT

Marc W. Buie, Southwest Research Institute

RECON