RECON: TNO occultation with 01SD291

Event between 01SD291 and star UC4-503-003253 with event index number of 206138

Geocentric closest approach at 2019/07/12 16:21:29 UTC

J2000 position of star is 02:09:57.3 +10:31:26
Equinox of date position of star is 02:10:54.9 +10:36:28
Stellar brightness R=16.5, use SENSEUP=128
Star is 153 degrees from the moon. Moon is 83% illuminated.
TNO apparent brightness V=24.6

TNO is 42.1 AU from the Sun and 42.4 AU from the Earth.
The TNO is moving 11.9 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 129 seconds.
The 1-sigma cross-track error in the shadow position is 1537 km.

The TNO has an absolute magnitude Hv=8.2
Diameter=138.7 km assuming a 5% albedo -- 11.7 sec chord
Diameter=56.6 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 01SD291, (2019/07/12 16:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:02.6 +16:32:49  0.8 35.93 171
6Bet Ari       01:55:43.4 +20:54:10  2.6 10.92 151
65Xi 1Cet      02:14:02.3 +08:56:15  4.4  1.84 153
PPM 118030     02:13:32.6 +10:25:10  8.5  0.66 154
PPM 117977     02:09:25.6 +10:41:40  9.5  0.39 153
PPM 118002     02:11:38.9 +10:40:12 11.6  0.17 153
01SD291        02:11:00.0 +10:36:55 16.5       153
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 01SD291, (2019/07/12 16:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 35.93 171
6Bet Ari       01:54:38.5 +20:48:27  2.6 10.92 151
65Xi 1Cet      02:13:00.0 +08:50:48  4.4  1.84 153
PPM 118030     02:12:29.9 +10:19:43  8.5  0.66 154
PPM 117977     02:08:23.0 +10:36:09  9.5  0.39 153
PPM 118002     02:10:36.2 +10:34:43 11.6  0.17 153
01SD291        02:09:57.3 +10:31:26 16.5       153
Positions are for J2000

Event circumstances last updated at 2017/12/06 19:07:28 UT

Marc W. Buie, Southwest Research Institute

RECON