RECON: TNO occultation with 471136

Event between (471136) 10EO65 and star UC4-293-095007 with event index number of 152659

Geocentric closest approach at 2018/09/24 04:24:58 UTC

J2000 position of star is 16:23:23.4 -31:35:47
Equinox of date position of star is 16:24:32.0 -31:38:14
Stellar brightness R=16.5, use SENSEUP=128
Star is 100 degrees from the moon. Moon is 99% illuminated.
TNO apparent brightness V=21.5

TNO is 14.5 AU from the Sun and 14.8 AU from the Earth.
The TNO is moving 21.4 km/sec on the sky relative to the star, or, 7.2 arcsec/hr.
The 1-sigma error in the time of the event is 149 seconds.
The 1-sigma cross-track error in the shadow position is 640 km.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.6 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 471136, (2018/09/24 04:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:33.5 -26:28:19  0.9  5.33 100
23Tau Sco      16:37:03.1 -28:15:12  2.8  4.33  98
PPM 295006     16:25:09.4 -33:14:35  6.2  1.61 100
PPM 295034     16:26:16.3 -31:27:50  7.6  0.40 100
PPM 295008     16:25:15.4 -31:53:57  9.9  0.30 100
PPM 294982     16:23:54.9 -31:41:43 10.3  0.15 100
471136         16:24:35.1 -31:38:20 16.5       100
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, (2018/09/24 04:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  5.33 100
23Tau Sco      16:35:53.0 -28:12:58  2.8  4.33  98
PPM 295006     16:23:56.8 -33:12:03  6.2  1.61 100
PPM 295034     16:25:04.7 -31:25:20  7.6  0.40 100
PPM 295008     16:24:03.6 -31:51:25  9.9  0.30 100
PPM 294982     16:22:43.2 -31:39:10 10.3  0.15 100
471136         16:23:23.4 -31:35:47 16.5       100
Positions are for J2000

Event circumstances last updated at 2017/12/05 18:57:45 UT

Marc W. Buie, Southwest Research Institute

RECON