RECON: TNO occultation with 10BK118

Event between 10BK118 and star UC4-155-194196 with event index number of 108817

Geocentric closest approach at 2018/03/23 12:49:36 UTC

J2000 position of star is 16:55:30.6 -59:04:03
Equinox of date position of star is 16:56:59.1 -59:05:36
Stellar brightness R=14.9
Star is 140 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=22.1

TNO is 14.6 AU from the Sun and 14.4 AU from the Earth.
The TNO is moving 21.7 km/sec on the sky relative to the star, or, 7.5 arcsec/hr.
The 1-sigma error in the time of the event is 92 seconds.
The 1-sigma cross-track error in the shadow position is 2050 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.5 km assuming a 5% albedo -- 2.6 sec chord
Diameter=22.6 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10BK118, (2018/03/23 12:50UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:40:51.6 -60:54:35  0.0 16.93 130
Bet Ara        17:26:49.1 -55:32:42  2.8  5.35 143
Eta Ara        16:51:22.0 -59:04:19  3.8  0.74 139
PPM 345556     16:59:43.2 -59:01:10  8.3  0.35 140
PPM 345529     16:57:23.0 -58:51:20  9.3  0.24 140
10BK118        16:57:05.8 -59:05:43 14.9       140
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 10BK118, (2018/03/23 12:50UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:39:27.4 -60:49:56  0.0 16.93 130
Bet Ara        17:25:18.0 -55:31:48  2.8  5.35 143
Eta Ara        16:49:47.2 -59:02:30  3.8  0.74 139
PPM 345556     16:58:08.0 -58:59:33  8.3  0.35 140
PPM 345529     16:55:48.2 -58:49:41  9.3  0.24 140
10BK118        16:55:30.6 -59:04:03 14.9       140
Positions are for J2000

Event circumstances last updated at 2016/12/09 18:57:08 UT

Marc W. Buie, Southwest Research Institute

RECON