RECON: TNO occultation with 523703

Event between (523703) 14HX199 and star GA0820:04881099 with event index number of 323966

Geocentric closest approach at 2019/06/01 20:54:34 UTC

J2000 position of star is 15:53:09.9 -07:56:09
Equinox of date position of star is 15:54:12.6 -07:59:32
Stellar brightness G=14.0, use SENSEUP=64
Star is 170 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=22.0

TNO is 30.6 AU from the Sun and 29.7 AU from the Earth.
The TNO is moving 22.9 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 75 seconds.
The 1-sigma cross-track error in the shadow position is 1199 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 10.0 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523703, (2019/06/01 20:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:24  0.9 20.40 160
1Del Oph       16:15:21.9 -03:44:35  2.7  6.76 163
50 Lib         16:01:50.7 -08:27:54  5.5  1.95 169
PPM 199019     15:52:52.9 -08:06:02  7.9  0.35 171
PPM 199039     15:53:36.4 -07:54:16  9.5  0.17 170
523703         15:54:12.7 -07:59:33 14.0       170
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 523703, (2019/06/01 20:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.40 160
1Del Oph       16:14:20.7 -03:41:42  2.7  6.76 163
50 Lib         16:00:47.6 -08:24:41  5.5  1.95 169
PPM 199019     15:51:50.1 -08:02:36  7.9  0.35 171
PPM 199039     15:52:33.6 -07:50:52  9.5  0.17 170
523703         15:53:09.9 -07:56:09 14.0       170
Positions are for J2000

Event circumstances last updated at 2019/05/23 22:39:50 UT

Marc W. Buie, Southwest Research Institute

RECON