RECON: TNO occultation with 06QJ181

Event between 06QJ181 and star GA1060:01475221 with event index number of 229473

Geocentric closest approach at 2019/12/04 16:18:38 UTC

J2000 position of star is 05:57:38.5 +16:24:38
Equinox of date position of star is 05:58:45.9 +16:24:41
Stellar brightness G=17.1, use SENSEUP=128
Star is 102 degrees from the moon. Moon is 54% illuminated.
TNO apparent brightness V=22.0

TNO is 32.2 AU from the Sun and 31.2 AU from the Earth.
The TNO is moving 23.1 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 201 seconds.
The 1-sigma cross-track error in the shadow position is 2235 km.

The TNO has an absolute magnitude Hv=6.9
Diameter=245.5 km assuming a 5% albedo -- 10.6 sec chord
Diameter=100.2 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is 3:1EE+3:1II
 
 
 
 
 
 
 
 

Star training set for 06QJ181, (2019/12/04 16:19UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:15.1 +07:24:33  0.4  9.02 100
Alhena         06:38:51.8 +16:22:50  1.9  9.61 112
137 Tau        05:53:30.2 +14:10:31  5.5  2.57 101
PPM 121634     05:57:59.7 +16:21:23  6.8  0.20 102
PPM 121671     05:59:21.4 +16:22:56  9.5  0.14 102
PPM 121650     05:58:26.9 +16:22:52 10.2  0.09 102
06QJ181        05:58:47.7 +16:24:41 17.1       103
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, (2019/12/04 16:19UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.02 100
Alhena         06:37:42.8 +16:23:57  1.9  9.61 112
137 Tau        05:52:22.2 +14:10:18  5.5  2.57 101
PPM 121634     05:56:50.6 +16:21:18  6.8  0.20 102
PPM 121671     05:58:12.3 +16:22:54  9.5  0.14 102
PPM 121650     05:57:17.8 +16:22:48 10.2  0.09 102
06QJ181        05:57:38.5 +16:24:38 17.1       102
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:57:03 UT

Marc W. Buie, Southwest Research Institute

RECON