RECON: TNO occultation with 28978

Event between (28978) Ixion and star GA0600:28072848 with event index number of 272511

Geocentric closest approach at 2020/06/27 01:31:19 UTC

J2000 position of star is 17:53:54.4 -29:49:25
Equinox of date position of star is 17:55:13.0 -29:49:35
Stellar brightness G=17.0, use SENSEUP=128
Star is 100 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=25.9

TNO is 39.0 AU from the Sun and 38.0 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 206 seconds.
The 1-sigma cross-track error in the shadow position is 2235 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=1148.2 km assuming a 5% albedo -- 2.4 sec chord
Diameter=468.7 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 28978, (2020/06/27 01:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:40.0 -26:28:33  0.9 18.91  81
34Ups Sco      17:32:09.5 -37:18:37  2.7  8.89  96
PPM 296839     17:50:30.4 -31:42:30  4.9  2.14  99
PPM 267505     17:56:27.5 -29:48:48  8.5  0.27 100
PPM 267486     17:55:42.0 -29:51:16  9.3  0.11 100
28978          17:55:13.1 -29:49:35 17.0       101
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 28978, (2020/06/27 01:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.91  81
34Ups Sco      17:30:45.8 -37:17:46  2.7  8.89  96
PPM 296839     17:49:10.5 -31:42:12  4.9  2.14  99
PPM 267505     17:55:08.8 -29:48:41  8.5  0.27 100
PPM 267486     17:54:23.3 -29:51:07  9.3  0.11 100
28978          17:53:54.4 -29:49:25 17.0       100
Positions are for J2000

Event circumstances last updated at 2020/06/21 04:15:59 UT

Marc W. Buie, Southwest Research Institute

RECON