RECON: TNO occultation with 523686

Event between (523686) 14DB143 and star GA0840:06739447 with event index number of 2621762

Geocentric closest approach at 2022/10/22 12:42:42 UTC

J2000 position of star is 17:56:43.1 -04:32:41
Equinox of date position of star is 17:57:55.5 -04:32:47
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 94 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=22.4

TNO is 19.9 AU from the Sun and 20.4 AU from the Earth.
The TNO is moving 23.0 km/sec on the sky relative to the star, or, 5.6 arcsec/hr.
The 1-sigma error in the time of the event is 67 seconds.
The 1-sigma cross-track error in the shadow position is 963 km.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 3.9 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523686, (2022/10/22 12:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:48.6 -26:28:50  0.9 30.24  77
60Bet Oph      17:44:36.0 +04:33:34  2.8  9.69  90
PPM 201226     17:58:00.1 -04:05:00  5.2  0.46  94
PPM 201213     17:57:27.6 -04:34:42  8.2  0.12  94
523686         17:57:55.7 -04:32:47 16.4        95
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 523686, (2022/10/22 12:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.24  77
60Bet Oph      17:43:28.3 +04:34:06  2.8  9.69  90
PPM 201226     17:56:47.8 -04:04:55  5.2  0.46  94
PPM 201213     17:56:15.0 -04:34:36  8.2  0.12  94
523686         17:56:43.1 -04:32:41 16.4        94
Positions are for J2000

Event circumstances last updated at 2022/10/02 04:08:46 UT

Marc W. Buie, Southwest Research Institute

RECON