RECON: TNO occultation with 469372

Event between (469372) 01QF298 and star UC4-426-000899 with event index number of 198668

Geocentric closest approach at 2019/06/12 16:20:15 UTC

J2000 position of star is 00:45:22.8 -04:58:36
Equinox of date position of star is 00:46:16.2 -04:52:52
Stellar brightness R=15.8, use SENSEUP=128
Star is 165 degrees from the moon. Moon is 76% illuminated.
TNO apparent brightness V=21.7

TNO is 43.5 AU from the Sun and 43.8 AU from the Earth.
The TNO is moving 14.2 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 315 seconds.
The 1-sigma cross-track error in the shadow position is 1803 km.

The TNO has an absolute magnitude Hv=5.2
Diameter=549.6 km assuming a 5% albedo -- 38.8 sec chord
Diameter=224.4 km assuming a 30% albedo -- 15.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 469372, (2019/06/12 16:20UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:43.2 -29:31:07  1.2 35.41 130
Diphda         00:44:33.8 -17:52:49  2.0 13.02 155
PPM 182626     00:46:23.5 -04:31:22  5.9  0.35 165
PPM 182647     00:47:40.0 -04:19:21  7.8  0.64 165
PPM 182625     00:46:19.6 -04:54:11  8.8  0.03 165
469372         00:46:22.1 -04:52:14 15.8       165
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 469372, (2019/06/12 16:20UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 35.41 130
Diphda         00:43:35.7 -17:59:11  2.0 13.02 155
PPM 182626     00:45:24.2 -04:37:44  5.9  0.35 165
PPM 182647     00:46:40.6 -04:25:42  7.8  0.64 165
PPM 182625     00:45:20.3 -05:00:33  8.8  0.03 165
469372         00:45:22.8 -04:58:36 15.8       165
Positions are for J2000

Event circumstances last updated at 2017/07/01 17:44:06 UT

Marc W. Buie, Southwest Research Institute

RECON