RECON: TNO occultation with 10BK118

Event between 10BK118 and star GA0360:19476685 with event index number of 1032462

Geocentric closest approach at 2021/01/18 05:21:12 UTC

J2000 position of star is 15:25:09.1 -52:18:04
Equinox of date position of star is 15:26:41.9 -52:22:25
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 109 degrees from the moon. Moon is 26% illuminated.
TNO apparent brightness V=23.4

TNO is 19.4 AU from the Sun and 19.8 AU from the Earth.
The TNO is moving 17.0 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 42 seconds.
The 1-sigma cross-track error in the shadow position is 719 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.2 km assuming a 5% albedo -- 3.2 sec chord
Diameter=22.5 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10BK118, (2021/01/18 05:21UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:41:02.7 -60:55:16  0.0 10.57 108
Eps Lup        15:24:07.2 -44:45:50  2.8  7.62 113
PPM 344240     15:50:26.1 -52:30:06  5.7  3.62 106
PPM 343683     15:25:35.5 -52:13:20  8.4  0.23 109
10BK118        15:26:42.3 -52:22:26 16.1       109
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, (2021/01/18 05:21UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:39:25.4 -60:49:53  0.0 10.57 108
Eps Lup        15:22:40.8 -44:41:23  2.8  7.62 113
PPM 344240     15:48:50.5 -52:26:18  5.7  3.62 106
PPM 343683     15:24:02.5 -52:08:56  8.4  0.23 109
10BK118        15:25:09.1 -52:18:04 16.1       109
Positions are for J2000

Event circumstances last updated at 2020/12/14 19:26:15 UT

Marc W. Buie, Southwest Research Institute

RECON