RECON: TNO occultation with 10BK118

Event between 10BK118 and star GA0360:16305296 with event index number of 1090078

Geocentric closest approach at 2021/06/08 14:02:02 UTC

J2000 position of star is 14:52:11.7 -52:47:39
Equinox of date position of star is 14:53:42.8 -52:52:50
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 144 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=23.3

TNO is 20.0 AU from the Sun and 19.2 AU from the Earth.
The TNO is moving 33.3 km/sec on the sky relative to the star, or, 8.6 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is 1466 km.

The TNO has an absolute magnitude Hv=10.2
Diameter=55.2 km assuming a 5% albedo -- 1.7 sec chord
Diameter=22.5 km assuming a 30% albedo -- 0.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10BK118, (2021/06/08 14:02UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:41:04.4 -60:55:21  0.0  8.22 136
Alp Lup        14:43:22.0 -47:28:44  2.3  5.65 149
PPM 343284     14:57:49.7 -52:53:42  5.5  0.62 144
PPM 343260     14:55:06.0 -53:19:25  7.7  0.49 144
PPM 343250     14:54:28.4 -52:58:03  9.7  0.14 144
PPM 343234     14:53:14.8 -52:59:35 10.2  0.13 144
10BK118        14:53:43.5 -52:52:52 16.0       144
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, (2021/06/08 14:02UT)
Object            RA         Dec     mag  sep  mel
PPM 360911     14:39:25.4 -60:49:53  0.0  8.22 136
Alp Lup        14:41:55.7 -47:23:18  2.3  5.65 149
PPM 343284     14:56:17.4 -52:48:34  5.5  0.62 144
PPM 343260     14:53:33.6 -53:14:14  7.7  0.49 144
PPM 343250     14:52:56.4 -52:52:51  9.7  0.14 144
PPM 343234     14:51:43.0 -52:54:22 10.2  0.13 144
10BK118        14:52:11.7 -52:47:39 16.0       144
Positions are for J2000

Event circumstances last updated at 2021/04/08 23:40:05 UT

Marc W. Buie, Southwest Research Institute

RECON