RECON: TNO occultation with 28978

Event between (28978) Ixion and star UC4-305-149495 with event index number of 184221

Geocentric closest approach at 2019/03/14 17:39:53 UTC

J2000 position of star is 17:53:20.8 -29:03:10
Equinox of date position of star is 17:54:26.7 -29:03:19
Stellar brightness R=15.4, use SENSEUP=128
Star is 172 degrees from the moon. Moon is 53% illuminated.
TNO apparent brightness V=19.7

TNO is 39.3 AU from the Sun and 39.4 AU from the Earth.
The TNO is moving 8.7 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 519 seconds.
The 1-sigma cross-track error in the shadow position is 3136 km.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 132.5 sec chord
Diameter=468.7 km assuming a 30% albedo -- 54.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 28978, (2019/03/14 17:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.3 -26:28:23  0.9 18.73 161
34Ups Sco      17:32:04.3 -37:18:33  2.7  9.50 163
3 Sgr          17:48:46.2 -27:50:11  4.2  1.76 173
PPM 267436     17:53:23.7 -28:27:16  8.4  0.65 173
PPM 267478     17:54:55.7 -29:00:53  8.7  0.09 172
28978          17:54:34.1 -29:03:20 15.4       172
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, (2019/03/14 17:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 18.73 161
34Ups Sco      17:30:45.8 -37:17:46  2.7  9.50 163
3 Sgr          17:47:33.6 -27:49:51  4.2  1.76 173
PPM 267436     17:52:10.8 -28:27:04  8.4  0.65 173
PPM 267478     17:53:42.4 -29:00:44  8.7  0.09 172
28978          17:53:20.8 -29:03:10 15.4       172
Positions are for J2000

Event circumstances last updated at 2017/04/01 16:57:19 UT

Marc W. Buie, Southwest Research Institute

RECON