RECON: TNO occultation with 556067

Event between (556067) 14JK80 and star GA0860:05128812 with event index number of 2488067

Geocentric closest approach at 2023/07/21 22:42:25 UTC

J2000 position of star is 16:54:23.6 -02:10:15
Equinox of date position of star is 16:55:37.0 -02:12:26
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 87 degrees from the moon. Moon is 15% illuminated.
Apparent brightness V=21.7

Object is 34.1 AU from the Sun and 33.5 AU from the Earth.
Apparent velocity is 16.7 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 92 seconds.
The 1-sigma cross-track error in the shadow position is 1237 km.

The object has an absolute magnitude Hv=6.3
Diameter=319.2 km assuming a 5% albedo -- 19.5 sec chord
Diameter=130.3 km assuming a 30% albedo -- 8.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 556067, (2023/07/21 22:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.3 -26:28:56  0.9 24.99  86
13Zet Oph      16:38:27.5 -10:36:47  2.6  9.42  84
PPM 179990     17:06:45.1 -00:55:22  5.4  3.06  89
PPM 179954     16:55:23.9 -01:38:59  7.1  0.56  87
PPM 179958     16:56:56.3 -02:07:56 10.0  0.34  87
556067         16:55:37.2 -02:12:27 16.7        87
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 556067, (2023/07/21 22:43UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 24.99  86
13Zet Oph      16:37:09.6 -10:34:01  2.6  9.42  84
PPM 179990     17:05:32.2 -00:53:32  5.4  3.06  89
PPM 179954     16:54:10.6 -01:36:46  7.1  0.56  87
PPM 179958     16:55:42.7 -02:05:46 10.0  0.34  87
556067         16:54:23.6 -02:10:15 16.7        87
Positions are for J2000

Event circumstances last updated at 2023/07/04 04:03:08 UT

Marc W. Buie, Southwest Research Institute

RECON