RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1060:13744292 with event index number of 2088850

Geocentric closest approach at 2022/11/18 15:05:17 UTC

J2000 position of star is 19:49:20.8 +17:03:52
Equinox of date position of star is 19:50:22.5 +17:07:22
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 120 degrees from the moon. Moon is 30% illuminated.
TNO apparent brightness V=21.9

TNO is 27.9 AU from the Sun and 28.2 AU from the Earth.
The TNO is moving 26.6 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 55 seconds.
The 1-sigma cross-track error in the shadow position is 1466 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=229.1 km assuming a 5% albedo -- 8.4 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 
 
 

Star training set for 523700, (2022/11/18 15:05UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:42.8 +38:48:22  0.0 26.86  98
Tarazed        19:47:20.8 +10:40:14  2.7  6.49 122
7Del Sge       19:48:24.5 +18:35:32  3.8  1.54 119
PPM 136996     19:48:59.6 +17:19:42  8.4  0.39 120
PPM 137028     19:49:53.8 +17:04:12  9.0  0.13 120
523700         19:50:22.8 +17:07:23 16.7       121
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, (2022/11/18 15:05UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 26.86  98
Tarazed        19:46:15.6 +10:36:48  2.7  6.49 122
7Del Sge       19:47:23.3 +18:32:04  3.8  1.54 119
PPM 136996     19:47:57.7 +17:16:13  8.4  0.39 120
PPM 137028     19:48:51.8 +17:00:41  9.0  0.13 120
523700         19:49:20.8 +17:03:52 16.7       120
Positions are for J2000

Event circumstances last updated at 2022/10/02 04:10:24 UT

Marc W. Buie, Southwest Research Institute

RECON