RECON: TNO occultation with 02GW32

Event between 02GW32 and star UC4-326-082084 with event index number of 123021

Geocentric closest approach at 2018/04/30 01:09:40 UTC

J2000 position of star is 16:26:53.9 -24:52:31
Equinox of date position of star is 16:27:53.9 -24:54:41
Stellar brightness R=13.7
Star is 30 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=22.9

TNO is 37.3 AU from the Sun and 36.4 AU from the Earth.
The TNO is moving 20.8 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 373 seconds.
The 1-sigma cross-track error in the shadow position is 3653 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=220.8 km assuming a 5% albedo -- 10.2 sec chord
Diameter=90.1 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is 5:4E
 
 
 
 
 
 
 
 

Star training set for 02GW32, (2018/04/30 01:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.0 -26:28:16  0.9  1.66  31
23Tau Sco      16:37:01.6 -28:15:09  2.8  3.90  34
22 Sco         16:31:19.5 -25:09:15  4.5  0.79  31
PPM 265560     16:29:31.9 -24:47:24  7.7  0.37  31
PPM 265545     16:28:20.7 -25:08:09 10.5  0.23  30
02GW32         16:28:00.7 -24:54:56 13.7        31
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 02GW32, (2018/04/30 01:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9  1.66  31
23Tau Sco      16:35:53.0 -28:12:58  2.8  3.90  34
22 Sco         16:30:12.5 -25:06:55  4.5  0.79  31
PPM 265560     16:28:25.2 -24:45:02  7.7  0.37  31
PPM 265545     16:27:13.8 -25:05:45 10.5  0.23  30
02GW32         16:26:53.9 -24:52:31 13.7        30
Positions are for J2000

Event circumstances last updated at 2016/06/15 19:37:30 UT

Marc W. Buie, Southwest Research Institute

RECON