RECON: TNO occultation with 523789

Event between (523789) 15FN345 and star GA0940:04397272 with event index number of 2607026

Geocentric closest approach at 2022/09/18 07:52:49 UTC

J2000 position of star is 16:34:22.5 +05:16:01
Equinox of date position of star is 16:35:27.0 +05:13:23
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 142 degrees from the moon. Moon is 46% illuminated.
TNO apparent brightness V=22.3

TNO is 38.8 AU from the Sun and 39.1 AU from the Earth.
The TNO is moving 19.2 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 97 seconds.
The 1-sigma cross-track error in the shadow position is 1642 km.

The TNO has an absolute magnitude Hv=6.2
Diameter=340.4 km assuming a 5% albedo -- 17.7 sec chord
Diameter=139.0 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 523789, (2022/09/18 07:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:48.2 -26:28:50  0.9 31.72 160
1Del Oph       16:15:32.3 -03:45:04  2.7 10.26 146
28 Her         16:33:42.8 +05:28:27  5.5  0.51 141
PPM 162753     16:32:45.7 +05:23:09  8.2  0.70 141
PPM 162821     16:36:04.9 +05:06:29  9.4  0.18 142
523789         16:35:29.8 +05:13:16 14.1       142
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 523789, (2022/09/18 07:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 31.72 160
1Del Oph       16:14:20.7 -03:41:43  2.7 10.26 146
28 Her         16:32:35.7 +05:31:15  5.5  0.51 141
PPM 162753     16:31:38.5 +05:26:00  8.2  0.70 141
PPM 162821     16:34:57.6 +05:09:13  9.4  0.18 142
523789         16:34:22.5 +05:16:01 14.1       142
Positions are for J2000

Event circumstances last updated at 2021/10/14 01:46:19 UT

Marc W. Buie, Southwest Research Institute

RECON