RECON: TNO occultation with 471136

Event between (471136) 10EO65 and star UC4-288-097424 with event index number of 146422

Geocentric closest approach at 2018/02/21 23:28:55 UTC

J2000 position of star is 16:37:09.5 -32:34:48
Equinox of date position of star is 16:38:16.8 -32:36:51
Stellar brightness R=16.0, use SENSEUP=128
Star is 149 degrees from the moon. Moon is 35% illuminated.
TNO apparent brightness V=21.4

TNO is 14.3 AU from the Sun and 14.4 AU from the Earth.
The TNO is moving 15.2 km/sec on the sky relative to the star, or, 5.2 arcsec/hr.
The 1-sigma error in the time of the event is 170 seconds.
The 1-sigma cross-track error in the shadow position is 1054 km.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 5.0 sec chord
Diameter=31.0 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 471136, (2018/02/21 23:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.4 -26:28:15  0.9  6.37 154
26Eps Sco      16:51:20.5 -34:19:28  2.3  3.21 146
PPM 295336     16:41:24.0 -33:46:40  6.4  1.33 148
PPM 295347     16:41:48.9 -32:24:51  8.1  0.76 149
PPM 295249     16:37:55.8 -32:29:31  9.4  0.15 149
471136         16:38:19.8 -32:36:56 16.0       149
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 471136, (2018/02/21 23:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  6.37 154
26Eps Sco      16:50:09.0 -34:17:40  2.3  3.21 146
PPM 295336     16:40:12.9 -33:44:37  6.4  1.33 148
PPM 295347     16:40:38.7 -32:22:48  8.1  0.76 149
PPM 295249     16:36:45.6 -32:27:22  9.4  0.15 149
471136         16:37:09.5 -32:34:48 16.0       149
Positions are for J2000

Event circumstances last updated at 2017/05/17 18:02:14 UT

Marc W. Buie, Southwest Research Institute

RECON