RECON: TNO occultation with 32532

Event between (32532) Thereus and star UC4-440-045698 with event index number of 184328

Geocentric closest approach at 2019/03/11 14:39:57 UTC

J2000 position of star is 08:25:08.2 -02:07:38
Equinox of date position of star is 08:26:02.6 -02:11:11
Stellar brightness R=15.6, use SENSEUP=128
Star is 82 degrees from the moon. Moon is 22% illuminated.
TNO apparent brightness V=20.3

TNO is 12.6 AU from the Sun and 11.8 AU from the Earth.
The TNO is moving 17.1 km/sec on the sky relative to the star, or, 7.2 arcsec/hr.
The 1-sigma error in the time of the event is 68 seconds.
The 1-sigma cross-track error in the shadow position is 1004 km.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 5.3 sec chord
Diameter=37.2 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 32532, (2019/03/11 14:40UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:59.6 -16:44:36 -1.5 28.59  62
Alphard        09:28:31.8 -08:44:34  2.0 16.85  98
1 Hya          08:25:32.4 -03:48:53  5.8  1.63  82
PPM 191346     08:27:27.0 -02:48:09  7.7  0.70  82
PPM 177438     08:26:06.4 -02:10:05  9.0  0.02  82
32532          08:26:06.4 -02:11:26 15.6        82
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 32532, (2019/03/11 14:40UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.2 -16:43:20 -1.5 28.59  62
Alphard        09:27:35.2 -08:39:31  2.0 16.85  98
1 Hya          08:24:34.7 -03:45:05  5.8  1.63  82
PPM 191346     08:26:29.0 -02:44:19  7.7  0.70  82
PPM 177438     08:25:08.1 -02:06:17  9.0  0.02  82
32532          08:25:08.2 -02:07:38 15.6        82
Positions are for J2000

Event circumstances last updated at 2017/12/05 19:17:46 UT

Marc W. Buie, Southwest Research Institute

RECON