RECON: TNO occultation with 10TH

Event between 10TH and star GA0960:00829731 with event index number of 254218

Geocentric closest approach at 2020/04/09 05:29:53 UTC

J2000 position of star is 05:35:11.2 +06:44:55
Equinox of date position of star is 05:36:16.5 +06:45:38
Stellar brightness G=16.7, use SENSEUP=128
Star is 132 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=23.0

TNO is 18.6 AU from the Sun and 19.0 AU from the Earth.
The TNO is moving 21.2 km/sec on the sky relative to the star, or, 5.5 arcsec/hr.
The 1-sigma error in the time of the event is 43 seconds.
The 1-sigma cross-track error in the shadow position is 797 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=81.7 km assuming a 5% albedo -- 2.8 sec chord
Diameter=33.3 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10TH, (2020/04/09 05:30UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:16.2 +07:24:33  0.4  5.00 127
Bellatrix      05:26:13.2 +06:21:59  1.6  2.53 134
PPM 149251     05:39:07.0 +07:33:06  5.7  1.06 131
PPM 149148     05:35:43.6 +06:08:19  8.0  0.64 132
PPM 149175     05:36:29.4 +06:46:36  8.6  0.05 132
10TH           05:36:16.7 +06:45:38 16.7       131
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 10TH, (2020/04/09 05:30UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  5.00 127
Bellatrix      05:25:07.8 +06:20:58  1.6  2.53 134
PPM 149251     05:38:01.1 +07:32:28  5.7  1.06 131
PPM 149148     05:34:38.4 +06:07:35  8.0  0.64 132
PPM 149175     05:35:23.9 +06:45:53  8.6  0.05 132
10TH           05:35:11.2 +06:44:55 16.7       132
Positions are for J2000

Event circumstances last updated at 2020/03/09 20:50:46 UT

Marc W. Buie, Southwest Research Institute

RECON