RECON: TNO occultation with 06QJ181

Event between 06QJ181 and star UC4-536-019010 with event index number of 164450

Geocentric closest approach at 2018/12/08 15:15:11 UTC

J2000 position of star is 05:47:29.3 +17:09:56
Equinox of date position of star is 05:48:29.9 +17:10:14
Stellar brightness R=16.1, use SENSEUP=128
Star is 174 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=21.4

TNO is 32.3 AU from the Sun and 31.4 AU from the Earth.
The TNO is moving 23.9 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 589 seconds.
The 1-sigma cross-track error in the shadow position is 2421 km.

The TNO has an absolute magnitude Hv=6.3
Diameter=331.1 km assuming a 5% albedo -- 13.8 sec chord
Diameter=135.2 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is 3:1EE+3:1II
 
 
 
 
 
 
 
 

Star training set for 06QJ181, (2018/12/08 15:15UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.9 +07:24:33  0.4  9.94 166
Alhena         06:38:48.3 +16:22:54  1.9 12.04 171
126 Tau        05:42:23.4 +16:32:32  4.6  1.61 172
PPM 121412     05:49:18.1 +17:30:06  8.2  0.37 174
PPM 121416     05:49:29.3 +16:58:22  9.9  0.29 174
06QJ181        05:48:35.3 +17:10:16 16.1       174
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 06QJ181, (2018/12/08 15:15UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.94 166
Alhena         06:37:42.8 +16:23:57  1.9 12.04 171
126 Tau        05:41:17.7 +16:32:02  4.6  1.61 172
PPM 121412     05:48:11.9 +17:29:47  8.2  0.37 174
PPM 121416     05:48:23.4 +16:58:03  9.9  0.29 174
06QJ181        05:47:29.3 +17:09:56 16.1       174
Positions are for J2000

Event circumstances last updated at 2017/05/19 18:07:55 UT

Marc W. Buie, Southwest Research Institute

RECON