RECON: TNO occultation with 471136

Event between (471136) 10EO65 and star UC4-289-092170 with event index number of 146405

Geocentric closest approach at 2018/02/05 04:56:20 UTC

J2000 position of star is 16:33:57.1 -32:18:53
Equinox of date position of star is 16:35:04.2 -32:21:00
Stellar brightness R=13.0, use SENSEUP=32
Star is 56 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=21.4

TNO is 14.3 AU from the Sun and 14.7 AU from the Earth.
The TNO is moving 22.9 km/sec on the sky relative to the star, or, 7.7 arcsec/hr.
The 1-sigma error in the time of the event is 117 seconds.
The 1-sigma cross-track error in the shadow position is 966 km.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.3 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 471136, (2018/02/05 04:56UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.2 -26:28:14  0.9  5.97  53
26Eps Sco      16:51:20.4 -34:19:28  2.3  3.92  60
PPM 295336     16:41:23.8 -33:46:40  6.4  1.94  58
PPM 295178     16:34:10.9 -31:35:31  7.5  0.79  55
PPM 295189     16:35:00.8 -32:21:00  8.9  0.02  56
471136         16:35:07.0 -32:21:05 13.0        56
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, (2018/02/05 04:56UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  5.97  53
26Eps Sco      16:50:09.0 -34:17:40  2.3  3.92  60
PPM 295336     16:40:12.9 -33:44:37  6.4  1.94  58
PPM 295178     16:33:01.5 -31:33:17  7.5  0.79  55
PPM 295189     16:33:50.9 -32:18:48  8.9  0.02  56
471136         16:33:57.1 -32:18:53 13.0        56
Positions are for J2000

Event circumstances last updated at 2017/05/17 18:00:42 UT

Marc W. Buie, Southwest Research Institute

RECON