RECON: TNO occultation with 10BK118

Event between 10BK118 and star UC4-161-161559 with event index number of 187029

Geocentric closest approach at 2019/05/02 21:01:51 UTC

J2000 position of star is 15:56:17.7 -57:55:50
Equinox of date position of star is 15:57:45.7 -57:58:54
Stellar brightness R=13.1, use SENSEUP=32
Star is 116 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=22.5

TNO is 16.5 AU from the Sun and 15.8 AU from the Earth.
The TNO is moving 33.1 km/sec on the sky relative to the star, or, 10.4 arcsec/hr.
The 1-sigma error in the time of the event is 45 seconds.
The 1-sigma cross-track error in the shadow position is 2527 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.5 km assuming a 5% albedo -- 1.7 sec chord
Diameter=22.6 km assuming a 30% albedo -- 0.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10BK118, (2019/05/02 21:02UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:40:56.2 -60:54:52  0.0 10.16 119
Bet TrA        15:56:51.8 -63:29:17  2.8  5.50 112
Iot2Nor        16:10:54.6 -57:59:04  5.6  1.73 115
PPM 344408     15:59:29.9 -58:20:59  8.2  0.42 115
PPM 344332     15:55:22.8 -57:58:21  9.1  0.33 116
10BK118        15:57:52.6 -57:59:08 13.1       116
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, (2019/05/02 21:02UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:39:27.0 -60:49:55  0.0 10.16 119
Bet TrA        15:55:08.0 -63:25:58  2.8  5.50 112
Iot2Nor        16:09:18.5 -57:56:05  5.6  1.73 115
PPM 344408     15:57:54.3 -58:17:44  8.2  0.42 115
PPM 344332     15:53:48.1 -57:55:00  9.1  0.33 116
10BK118        15:56:17.7 -57:55:50 13.1       116
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:53:56 UT

Marc W. Buie, Southwest Research Institute

RECON