RECON: TNO occultation with 13UE15

Event between 13UE15 and star UC4-595-017890 with event index number of 226379

Geocentric closest approach at 2019/11/23 20:35:17 UTC

J2000 position of star is 05:18:12.9 +28:55:27
Equinox of date position of star is 05:19:26.8 +28:56:37
Stellar brightness R=16.6, use SENSEUP=128
Star is 123 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=22.1

TNO is 22.7 AU from the Sun and 21.8 AU from the Earth.
The TNO is moving 20.9 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 82 seconds.
The 1-sigma cross-track error in the shadow position is 845 km.

The TNO has an absolute magnitude Hv=8.5
Diameter=119.7 km assuming a 5% albedo -- 5.7 sec chord
Diameter=48.9 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 13UE15, (2019/11/23 20:35UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:03.9 +16:32:52  0.8 15.77 135
Alnath         05:27:33.1 +28:37:21  1.6  1.80 121
PPM 094297     05:22:28.7 +29:35:17  5.7  0.92 122
PPM 094248     05:19:30.9 +28:47:58  7.4  0.14 123
13UE15         05:19:28.6 +28:56:38 16.6       122
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 13UE15, (2019/11/23 20:35UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 15.77 135
Alnath         05:26:17.5 +28:36:23  1.6  1.80 121
PPM 094297     05:21:12.7 +29:34:11  5.7  0.92 122
PPM 094248     05:18:15.4 +28:46:47  7.4  0.14 123
13UE15         05:18:12.9 +28:55:27 16.6       123
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:54:41 UT

Marc W. Buie, Southwest Research Institute

RECON