RECON: TNO occultation with 10BK118

Event between 10BK118 and star UC4-166-167510 with event index number of 84056

Geocentric closest approach at 2017/10/09 10:52:38 UTC

J2000 position of star is 16:23:28.9 -56:48:28
Equinox of date position of star is 16:24:52.6 -56:50:46
Stellar brightness R=15.2
Star is 140 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=22.0

TNO is 13.8 AU from the Sun and 14.2 AU from the Earth.
The TNO is moving 17.6 km/sec on the sky relative to the star, or, 6.2 arcsec/hr.
The 1-sigma error in the time of the event is 115 seconds.
The 1-sigma cross-track error in the shadow position is 1990 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.5 km assuming a 5% albedo -- 3.2 sec chord
Diameter=22.6 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10BK118, (2017/10/09 10:53UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:40:49.5 -60:54:28  0.0 13.95 132
Bet TrA        15:56:43.4 -63:29:01  2.8  7.50 133
PPM 345112     16:31:14.7 -57:47:39  6.3  1.27 139
PPM 344996     16:26:16.2 -57:02:47  7.6  0.27 139
PPM 344928     16:23:29.3 -56:43:36  9.4  0.23 140
10BK118        16:24:56.7 -56:50:52 15.2       139
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, (2017/10/09 10:53UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:39:27.4 -60:49:56  0.0 13.95 132
Bet TrA        15:55:08.1 -63:25:57  2.8  7.50 133
PPM 345112     16:29:45.2 -57:45:23  6.3  1.27 139
PPM 344996     16:24:48.0 -57:00:24  7.6  0.27 139
PPM 344928     16:22:01.7 -56:41:09  9.4  0.23 140
10BK118        16:23:28.9 -56:48:28 15.2       139
Positions are for J2000

Event circumstances last updated at 2016/12/09 18:53:54 UT

Marc W. Buie, Southwest Research Institute

RECON