RECON: TNO occultation with 523591

Event between (523591) 01QD298 and star GA0800:21844518 with event index number of 317045

Geocentric closest approach at 2020/07/08 16:02:42 UTC

J2000 position of star is 23:19:31.0 -09:51:53
Equinox of date position of star is 23:20:34.8 -09:45:09
Stellar brightness G=16.8, use SENSEUP=128
Star is 18 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=26.3

TNO is 42.0 AU from the Sun and 41.5 AU from the Earth.
The TNO is moving 10.2 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 404 seconds.
The 1-sigma cross-track error in the shadow position is 4404 km.

The TNO has an absolute magnitude Hv=10.0
Diameter=316.2 km assuming a 5% albedo -- 5.9 sec chord
Diameter=129.1 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 523591, (2020/07/08 16:03UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:46.8 -29:30:47  1.2 20.41  17
95Psi3Aqr      23:20:01.7 -09:29:54  5.0  0.29  18
PPM 207471     23:22:54.7 -09:38:56  8.1  0.58  18
PPM 207428     23:20:42.9 -09:33:51  8.8  0.19  18
523591         23:20:34.9 -09:45:08 16.8        18
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 523591, (2020/07/08 16:03UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:23  1.2 20.41  17
95Psi3Aqr      23:18:57.8 -09:36:39  5.0  0.29  18
PPM 207471     23:21:50.9 -09:45:41  8.1  0.58  18
PPM 207428     23:19:39.0 -09:40:36  8.8  0.19  18
523591         23:19:31.0 -09:51:53 16.8        18
Positions are for J2000

Event circumstances last updated at 2020/06/21 04:43:19 UT

Marc W. Buie, Southwest Research Institute

RECON