RECON: TNO occultation with 10TH

Event between 10TH and star UC4-480-013632 with event index number of 208666

Geocentric closest approach at 2019/08/22 09:22:14 UTC

J2000 position of star is 05:47:30.5 +05:57:13
Equinox of date position of star is 05:48:27.3 +05:57:31
Stellar brightness R=13.9, use SENSEUP=64
Star is 43 degrees from the moon. Moon is 62% illuminated.
TNO apparent brightness V=22.2

TNO is 18.3 AU from the Sun and 18.7 AU from the Earth.
The TNO is moving 20.3 km/sec on the sky relative to the star, or, 5.4 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 1021 km.

The TNO has an absolute magnitude Hv=9.2
Diameter=88.3 km assuming a 5% albedo -- 4.3 sec chord
Diameter=36.1 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 10TH, (2019/08/22 09:22UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:14.1 +07:24:33  0.4  2.39  45
Bellatrix      05:26:11.1 +06:21:57  1.6  5.58  38
52 Ori         05:49:03.5 +06:27:34  5.5  0.52  43
PPM 149408     05:46:28.7 +06:18:16  7.0  0.62  43
PPM 149472     05:48:44.9 +05:53:22  8.8  0.08  43
10TH           05:48:33.6 +05:57:33 13.9        43
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, (2019/08/22 09:22UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  2.39  45
Bellatrix      05:25:07.8 +06:20:58  1.6  5.58  38
52 Ori         05:48:00.2 +06:27:15  5.5  0.52  43
PPM 149408     05:45:25.5 +06:17:52  7.0  0.62  43
PPM 149472     05:47:41.8 +05:53:01  8.8  0.08  43
10TH           05:47:30.5 +05:57:13 13.9        43
Positions are for J2000

Event circumstances last updated at 2017/09/01 17:02:54 UT

Marc W. Buie, Southwest Research Institute

RECON