RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1120:07221472 with event index number of 324370

Geocentric closest approach at 2019/09/17 01:10:23 UTC

J2000 position of star is 19:14:21.0 +22:21:59
Equinox of date position of star is 19:15:10.6 +22:24:04
Stellar brightness G=16.1, use SENSEUP=128
Star is 94 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=21.6

TNO is 26.8 AU from the Sun and 26.4 AU from the Earth.
The TNO is moving 23.6 km/sec on the sky relative to the star, or, 4.4 arcsec/hr.
The 1-sigma error in the time of the event is 49 seconds.
The 1-sigma cross-track error in the shadow position is 1600 km.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.7 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 
 
 

Star training set for 523700, (2019/09/17 01:10UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:36.4 +38:48:11  0.0 18.26  99
Tarazed        19:47:11.8 +10:39:45  2.7 14.01  88
PPM 108572     19:13:27.5 +21:35:19  5.9  0.91  95
PPM 108592     19:13:58.5 +21:56:32  8.3  0.54  94
PPM 108649     19:15:41.4 +22:19:57  8.9  0.13  94
523700         19:15:11.3 +22:24:06 16.1        94
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 523700, (2019/09/17 01:10UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 18.26  99
Tarazed        19:46:15.6 +10:36:48  2.7 14.01  88
PPM 108572     19:12:36.8 +21:33:15  5.9  0.91  95
PPM 108592     19:13:07.9 +21:54:27  8.3  0.54  94
PPM 108649     19:14:51.0 +22:17:49  8.9  0.13  94
523700         19:14:21.0 +22:21:59 16.1        94
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:40:05 UT

Marc W. Buie, Southwest Research Institute

RECON