RECON: TNO occultation with 543377

Event between (543377) 14BF70 and star GA0560:09600379 with event index number of 2253204

Geocentric closest approach at 2027/03/14 01:24:37 UTC

J2000 position of star is 16:21:27.1 -32:02:53
Equinox of date position of star is 16:23:01.0 -32:06:16
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 172 degrees from the moon. Moon is 32% illuminated.
Apparent brightness V=20.6

Object is 11.8 AU from the Sun and 11.5 AU from the Earth.
Apparent velocity is 6.2 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 168 seconds.
The 1-sigma cross-track error in the shadow position is 1444 km.

The object has an absolute magnitude Hv=9.5
Diameter=75.5 km assuming a 5% albedo -- 12.3 sec chord
Diameter=30.8 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 543377, (2027/03/14 01:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:04.8 -26:29:24  0.9  5.88 173
23Tau Sco      16:37:34.8 -28:16:12  2.8  4.94 171
PPM 295006     16:25:42.2 -33:15:43  6.2  1.27 170
PPM 295043     16:27:21.1 -32:08:14  7.6  0.88 171
PPM 294965     16:23:32.5 -32:15:10  8.6  0.16 171
543377         16:23:11.5 -32:06:38 16.0       171
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 543377, (2027/03/14 01:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  5.88 173
23Tau Sco      16:35:52.9 -28:12:58  2.8  4.94 171
PPM 295006     16:23:56.8 -33:12:03  6.2  1.27 170
PPM 295043     16:25:36.5 -32:04:37  7.6  0.88 171
PPM 294965     16:21:48.0 -32:11:26  8.6  0.16 171
543377         16:21:27.1 -32:02:53 16.0       172
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:27:18 UT

Marc W. Buie, Southwest Research Institute

RECON