RECON: TNO occultation with 03WA191

Event between 03WA191 and star UC4-544-023001 with event index number of 93097

Geocentric closest approach at 2017/12/05 15:06:56 UTC

J2000 position of star is 06:10:15.5 +18:46:02
Equinox of date position of star is 06:11:16.8 +18:45:46
Stellar brightness R=15.5, use SENSEUP=128
Star is 9 degrees from the moon. Moon is 94% illuminated.
TNO apparent brightness V=23.4

TNO is 31.9 AU from the Sun and 31.0 AU from the Earth.
The TNO is moving 23.0 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 985 seconds.
The 1-sigma cross-track error in the shadow position is 2584 km.

The TNO has an absolute magnitude Hv=8.3
Diameter=133.0 km assuming a 5% albedo -- 5.8 sec chord
Diameter=54.3 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 03WA191, (2017/12/05 15:07UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:08.6 +07:24:32  0.4 11.94  18
Alhena         06:38:44.8 +16:22:57  1.9  6.96   5
PPM 122116     06:14:36.5 +18:40:26  6.3  0.79   9
PPM 122032     06:11:45.8 +18:41:52  8.1  0.12   9
03WA191        06:11:18.8 +18:45:45 15.5         9
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 03WA191, (2017/12/05 15:07UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 11.94  18
Alhena         06:37:42.8 +16:23:57  1.9  6.96   5
PPM 122116     06:13:33.3 +18:40:48  6.3  0.79   9
PPM 122032     06:10:42.5 +18:42:10  8.1  0.12   9
03WA191        06:10:15.5 +18:46:02 15.5         9
Positions are for J2000

Event circumstances last updated at 2017/05/14 18:37:43 UT

Marc W. Buie, Southwest Research Institute

RECON