RECON: TNO occultation with 11JA32

Event between 11JA32 and star UC4-349-163278 with event index number of 204975

Geocentric closest approach at 2017/11/05 10:07:16 UTC

J2000 position of star is 18:59:36.4 -20:18:28
Equinox of date position of star is 19:00:38.9 -20:16:57
Stellar brightness R=16.2, use SENSEUP=128
Star is 136 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=26.3

TNO is 42.7 AU from the Sun and 43.1 AU from the Earth.
The TNO is moving 19.7 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 732 seconds.
The 1-sigma cross-track error in the shadow position is 2216 km.

The TNO has an absolute magnitude Hv=9.8
Diameter=67.6 km assuming a 5% albedo -- 3.4 sec chord
Diameter=27.6 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 11JA32, (2017/11/05 10:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:30.3 -26:28:12  0.9 34.88 166
Nunki          18:56:22.2 -26:16:23  2.0  6.07 137
36Xi 1Sgr      18:58:24.1 -20:37:54  5.1  0.63 136
PPM 269140     18:59:14.3 -20:23:55  7.5  0.35 136
PPM 269165     19:00:14.3 -20:29:10  9.8  0.23 136
11JA32         19:00:39.8 -20:16:55 16.2       136
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 11JA32, (2017/11/05 10:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.88 166
Nunki          18:55:15.9 -26:17:49  2.0  6.07 137
36Xi 1Sgr      18:57:20.5 -20:39:23  5.1  0.63 136
PPM 269140     18:58:10.8 -20:25:26  7.5  0.35 136
PPM 269165     18:59:10.8 -20:30:42  9.8  0.23 136
11JA32         18:59:36.4 -20:18:28 16.2       136
Positions are for J2000

Event circumstances last updated at 2017/08/01 16:34:12 UT

Marc W. Buie, Southwest Research Institute

RECON