RECON: TNO occultation with 11UK413

Event between 11UK413 and star UC4-559-015639 with event index number of 178781

Geocentric closest approach at 2019/01/19 20:23:02 UTC

J2000 position of star is 05:26:08.2 +21:37:11
Equinox of date position of star is 05:27:10.7 +21:38:01
Stellar brightness R=15.7, use SENSEUP=128
Star is 18 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=22.7

TNO is 41.9 AU from the Sun and 41.1 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 931 seconds.
The 1-sigma cross-track error in the shadow position is 3662 km.

The TNO has an absolute magnitude Hv=6.4
Diameter=317.7 km assuming a 5% albedo -- 16.0 sec chord
Diameter=129.7 km assuming a 30% albedo -- 6.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 11UK413, (2019/01/19 20:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:01.0 +16:32:46  0.8 12.91  31
Alnath         05:27:29.9 +28:37:19  1.6  6.99  19
114 Tau        05:28:46.8 +21:57:06  4.7  0.47  18
PPM 094348     05:26:18.4 +20:35:58  6.6  1.06  18
PPM 094354     05:27:02.5 +21:48:05  9.6  0.18  18
11UK413        05:27:16.7 +21:38:06 15.7        18
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 11UK413, (2019/01/19 20:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 12.91  31
Alnath         05:26:17.5 +28:36:24  1.6  6.99  19
114 Tau        05:27:38.1 +21:56:13  4.7  0.47  18
PPM 094348     05:25:10.3 +20:35:01  6.6  1.06  18
PPM 094354     05:25:53.8 +21:47:09  9.6  0.18  18
11UK413        05:26:08.2 +21:37:11 15.7        18
Positions are for J2000

Event circumstances last updated at 2017/05/20 18:08:56 UT

Marc W. Buie, Southwest Research Institute

RECON