RECON: TNO occultation with 00SR331

Event between 00SR331 and star UC4-542-036038 with event index number of 168443

Geocentric closest approach at 2019/01/04 23:53:30 UTC

J2000 position of star is 06:58:48.4 +18:20:19
Equinox of date position of star is 06:59:49.2 +18:18:50
Stellar brightness R=15.0, use SENSEUP=128
Star is 168 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=23.9

TNO is 32.5 AU from the Sun and 31.5 AU from the Earth.
The TNO is moving 24.2 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 842 seconds.
The 1-sigma cross-track error in the shadow position is 1217 km.

The TNO has an absolute magnitude Hv=8.8
Diameter=106.2 km assuming a 5% albedo -- 4.4 sec chord
Diameter=43.3 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 
 
 

Star training set for 00SR331, (2019/01/04 23:54UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.7 +27:58:44  1.1 14.41 158
Alhena         06:38:48.6 +16:22:53  1.9  5.39 172
PPM 123373     07:01:23.4 +15:30:26  6.4  2.83 167
PPM 123314     06:58:49.4 +17:52:31  6.7  0.51 168
PPM 123345     07:00:17.3 +18:41:34  9.4  0.39 168
00SR331        06:59:55.0 +18:18:42 15.0       168
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 00SR331, (2019/01/04 23:54UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 14.41 158
Alhena         06:37:42.8 +16:23:57  1.9  5.39 172
PPM 123373     07:00:18.1 +15:32:06  6.4  2.83 167
PPM 123314     06:57:43.0 +17:54:07  6.7  0.51 168
PPM 123345     06:59:10.5 +18:43:12  9.4  0.39 168
00SR331        06:58:48.4 +18:20:19 15.0       168
Positions are for J2000

Event circumstances last updated at 2017/05/13 17:37:00 UT

Marc W. Buie, Southwest Research Institute

RECON