RECON: TNO occultation with 10BK118

Event between 10BK118 and star GA0400:10491992 with event index number of 2077382

Geocentric closest approach at 2022/07/24 09:52:01 UTC

J2000 position of star is 14:29:50.3 -49:21:23
Equinox of date position of star is 14:31:19.7 -49:27:15
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 143 degrees from the moon. Moon is 16% illuminated.
TNO apparent brightness V=23.8

TNO is 21.8 AU from the Sun and 21.5 AU from the Earth.
The TNO is moving 21.9 km/sec on the sky relative to the star, or, 5.1 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 2551 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.2 km assuming a 5% albedo -- 2.5 sec chord
Diameter=22.5 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10BK118, (2022/07/24 09:52UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:41:09.4 -60:55:38  0.0 11.55 137
Alp Lup        14:43:26.5 -47:29:01  2.3  2.81 146
PPM 319590     14:31:51.9 -49:37:07  5.4  0.18 143
PPM 319617     14:33:32.4 -48:56:52  7.9  0.62 144
PPM 319593     14:31:59.4 -49:28:19  8.9  0.10 143
10BK118        14:31:21.1 -49:27:21 16.6       143
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, (2022/07/24 09:52UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:39:25.2 -60:49:52  0.0 11.55 137
Alp Lup        14:41:55.7 -47:23:18  2.3  2.81 146
PPM 319590     14:30:20.8 -49:31:09  5.4  0.18 143
PPM 319617     14:32:01.7 -48:50:56  7.9  0.62 144
PPM 319593     14:30:28.4 -49:22:21  8.9  0.10 143
10BK118        14:29:50.3 -49:21:23 16.6       143
Positions are for J2000

Event circumstances last updated at 2022/03/14 01:06:00 UT

Marc W. Buie, Southwest Research Institute

RECON