RECON: TNO occultation with 523658

Event between (523658) 12DW98 and star GA0780:04383033 with event index number of 324589

Geocentric closest approach at 2019/04/22 00:05:43 UTC

J2000 position of star is 13:27:23.2 -11:08:41
Equinox of date position of star is 13:28:23.9 -11:14:36
Stellar brightness G=16.2, use SENSEUP=128
Star is 41 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=22.0

TNO is 39.7 AU from the Sun and 38.7 AU from the Earth.
The TNO is moving 25.0 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 73 seconds.
The 1-sigma cross-track error in the shadow position is 1513 km.

The TNO has an absolute magnitude Hv=6.0
Diameter=380.2 km assuming a 5% albedo -- 15.2 sec chord
Diameter=155.2 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 523658, (2019/04/22 00:06UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:12.8 -11:15:41  1.0  0.54  41
68 Vir         13:27:44.5 -12:48:27  5.3  1.57  40
PPM 227239     13:24:57.5 -10:58:17  8.1  0.89  41
PPM 227304     13:28:01.8 -11:26:21  9.2  0.22  41
523658         13:28:24.4 -11:14:40 16.2        40
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 523658, (2019/04/22 00:06UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  0.54  41
68 Vir         13:26:43.0 -12:42:28  5.3  1.57  40
PPM 227239     13:23:56.4 -10:52:16  8.1  0.89  41
PPM 227304     13:27:00.5 -11:20:22  9.2  0.22  41
523658         13:27:23.2 -11:08:41 16.2        41
Positions are for J2000

Event circumstances last updated at 2019/02/12 07:20:31 UT

Marc W. Buie, Southwest Research Institute

RECON