RECON: TNO occultation with 10BK118

Event between 10BK118 and star UC4-162-148499 with event index number of 130898

Geocentric closest approach at 2018/07/27 14:07:32 UTC

J2000 position of star is 15:48:38.9 -57:46:13
Equinox of date position of star is 15:50:06.1 -57:49:27
Stellar brightness R=15.3, use SENSEUP=128
Star is 61 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.3

TNO is 15.2 AU from the Sun and 14.7 AU from the Earth.
The TNO is moving 27.7 km/sec on the sky relative to the star, or, 9.4 arcsec/hr.
The 1-sigma error in the time of the event is 71 seconds.
The 1-sigma cross-track error in the shadow position is 1890 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.5 km assuming a 5% albedo -- 2.0 sec chord
Diameter=22.6 km assuming a 30% albedo -- 0.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10BK118, (2018/07/27 14:08UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:40:52.7 -60:54:40  0.0  9.31  70
Bet TrA        15:56:47.7 -63:29:09  2.8  5.72  62
PPM 344043     15:41:28.6 -59:58:06  6.3  2.42  63
PPM 344186     15:47:49.0 -57:52:09  7.1  0.31  62
PPM 344235     15:50:04.7 -57:50:27  8.7  0.02  61
10BK118        15:50:09.2 -57:49:34 15.3        61
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, (2018/07/27 14:08UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:39:27.0 -60:49:55  0.0  9.31  70
Bet TrA        15:55:08.0 -63:25:58  2.8  5.72  62
PPM 344043     15:39:56.3 -59:54:34  6.3  2.42  63
PPM 344186     15:46:18.9 -57:48:45  7.1  0.31  62
PPM 344235     15:48:34.4 -57:47:06  8.7  0.02  61
10BK118        15:48:38.9 -57:46:13 15.3        61
Positions are for J2000

Event circumstances last updated at 2017/12/05 18:49:47 UT

Marc W. Buie, Southwest Research Institute

RECON