RECON: TNO occultation with 10BK118

Event between 10BK118 and star UC4-153-179689 with event index number of 126990

Geocentric closest approach at 2018/06/16 20:03:11 UTC

J2000 position of star is 16:07:38.3 -59:29:30
Equinox of date position of star is 16:09:04.4 -59:32:09
Stellar brightness R=15.6
Star is 117 degrees from the moon. Moon is 13% illuminated.
TNO apparent brightness V=22.1

TNO is 15.0 AU from the Sun and 14.2 AU from the Earth.
The TNO is moving 35.7 km/sec on the sky relative to the star, or, 12.5 arcsec/hr.
The 1-sigma error in the time of the event is 70 seconds.
The 1-sigma cross-track error in the shadow position is 1346 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.5 km assuming a 5% albedo -- 1.6 sec chord
Diameter=22.6 km assuming a 30% albedo -- 0.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10BK118, (2018/06/16 20:03UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:40:52.7 -60:54:39  0.0 11.00 106
Bet TrA        15:56:47.1 -63:29:08  2.8  4.21 115
Iot2Nor        16:10:50.2 -57:58:56  5.6  1.57 117
PPM 344650     16:12:50.5 -59:36:32  8.4  0.47 117
PPM 344575     16:08:37.6 -59:33:59  9.2  0.08 117
10BK118        16:09:12.1 -59:32:23 15.6       117
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, (2018/06/16 20:03UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:39:27.4 -60:49:56  0.0 11.00 106
Bet TrA        15:55:08.1 -63:25:57  2.8  4.21 115
Iot2Nor        16:09:18.5 -57:56:05  5.6  1.57 117
PPM 344650     16:11:16.3 -59:33:44  8.4  0.47 117
PPM 344575     16:07:03.9 -59:31:05  9.2  0.08 117
10BK118        16:07:38.3 -59:29:30 15.6       117
Positions are for J2000

Event circumstances last updated at 2016/12/10 17:29:10 UT

Marc W. Buie, Southwest Research Institute

RECON