RECON: TNO occultation with 523704

Event between (523704) 14HB200 and star GA0680:06201882 with event index number of 2263493

Geocentric closest approach at 2022/05/03 14:49:15 UTC

J2000 position of star is 15:18:02.9 -20:20:26
Equinox of date position of star is 15:19:18.2 -20:25:09
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 159 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=22.2

TNO is 29.9 AU from the Sun and 28.9 AU from the Earth.
The TNO is moving 23.1 km/sec on the sky relative to the star, or, 4.0 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 1260 km.

The TNO has an absolute magnitude Hv=7.5
Diameter=187.1 km assuming a 5% albedo -- 8.1 sec chord
Diameter=76.4 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 523704, (2022/05/03 14:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:46.8 -26:28:47  0.9 17.45 175
7Del Sco       16:01:39.5 -22:41:01  2.3 10.10 169
PPM 264038     15:17:41.0 -22:28:50  5.5  2.10 159
PPM 264063     15:19:08.3 -20:48:10  8.2  0.38 159
PPM 264065     15:19:10.2 -20:28:35  9.7  0.07 158
523704         15:19:20.1 -20:25:16 16.0       159
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 523704, (2022/05/03 14:48UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.45 175
7Del Sco       16:00:20.0 -22:37:19  2.3 10.10 169
PPM 264038     15:16:23.0 -22:23:58  5.5  2.10 159
PPM 264063     15:17:51.0 -20:43:20  8.2  0.38 159
PPM 264065     15:17:53.0 -20:23:45  9.7  0.07 158
523704         15:18:02.9 -20:20:26 16.0       158
Positions are for J2000

Event circumstances last updated at 2021/10/12 02:08:49 UT

Marc W. Buie, Southwest Research Institute

RECON