RECON: TNO occultation with 12DR30

Event between 12DR30 and star UC4-179-033792 with event index number of 67744

Geocentric closest approach at 2017/06/17 15:03:28 UTC

J2000 position of star is 09:25:00.6 -54:22:28
Equinox of date position of star is 09:25:33.8 -54:27:00
Stellar brightness R=14.4, use SENSEUP=128
Star is 114 degrees from the moon. Moon is 49% illuminated.
TNO apparent brightness V=19.9

TNO is 17.7 AU from the Sun and 17.6 AU from the Earth.
The TNO is moving 17.7 km/sec on the sky relative to the star, or, 5.0 arcsec/hr.
The 1-sigma error in the time of the event is 144 seconds.
The 1-sigma cross-track error in the shadow position is 2565 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=227.0 km assuming a 5% albedo -- 12.8 sec chord
Diameter=92.7 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is CENTAURS
 
 
 
 
 
 
 
 

Star training set for 12DR30, (2017/06/17 15:03UT)
Object            RA         Dec     mag  sep  mel
Canopus        06:24:20.4 -52:42:21 -0.7 26.49  91
Kap Vel        09:22:39.3 -55:05:09  2.5  0.76 114
PPM 337956     09:26:52.1 -53:27:19  4.9  1.01 115
PPM 337934     09:25:52.6 -54:32:23  6.7  0.10 114
12DR30         09:25:33.9 -54:27:01 14.4       114
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 12DR30, (2017/06/17 15:03UT)
Object            RA         Dec     mag  sep  mel
Canopus        06:23:57.2 -52:41:44 -0.7 26.49  91
Kap Vel        09:22:06.8 -55:00:38  2.5  0.76 114
PPM 337956     09:26:17.9 -53:22:44  4.9  1.01 115
PPM 337934     09:25:19.3 -54:27:50  6.7  0.10 114
12DR30         09:25:00.6 -54:22:28 14.4       114
Positions are for J2000

Event circumstances last updated at 2017/05/26 17:23:20 UT

Marc W. Buie, Southwest Research Institute

RECON