RECON: TNO occultation with 523686

Event between (523686) 14DB143 and star GA0860:07315231 with event index number of 2621866

Geocentric closest approach at 2023/06/13 16:18:01 UTC

J2000 position of star is 18:19:23.9 -02:37:19
Equinox of date position of star is 18:20:37.0 -02:36:38
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 112 degrees from the moon. Moon is 20% illuminated.
Apparent brightness V=22.1

Object is 20.0 AU from the Sun and 19.1 AU from the Earth.
Apparent velocity is 22.2 km/sec on the sky relative to the star, or, 5.8 arcsec/hr.
The 1-sigma error in the time of the event is 96 seconds.
The 1-sigma cross-track error in the shadow position is 849 km.

The object has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 4.1 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523686, (2023/06/13 16:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.9 -26:28:55  0.9 35.53 139
60Bet Oph      17:44:37.9 +04:33:33  2.8 11.50 119
58Eta Ser      18:22:31.5 -02:53:26  3.3  0.55 112
PPM 201610     18:20:15.0 -03:09:27  7.9  0.55 112
PPM 201608     18:20:09.9 -02:30:56  9.6  0.15 112
523686         18:20:37.5 -02:36:38 16.5       112
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, (2023/06/13 16:18UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 35.53 139
60Bet Oph      17:43:28.3 +04:34:06  2.8 11.50 119
58Eta Ser      18:21:17.8 -02:54:11  3.3  0.55 112
PPM 201610     18:19:01.2 -03:10:07  7.9  0.55 112
PPM 201608     18:18:56.5 -02:31:36  9.6  0.15 112
523686         18:19:23.9 -02:37:19 16.5       112
Positions are for J2000

Event circumstances last updated at 2023/04/20 03:43:15 UT

Marc W. Buie, Southwest Research Institute

RECON