RECON: TNO occultation with 556130

Event between (556130) 14KV101 and star GA0840:04854398 with event index number of 2501958

Geocentric closest approach at 2022/09/09 01:55:13 UTC

J2000 position of star is 16:09:00.4 -04:08:36
Equinox of date position of star is 16:10:11.0 -04:12:03
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 89 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=22.4

TNO is 31.2 AU from the Sun and 31.4 AU from the Earth.
The TNO is moving 15.9 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 99 seconds.
The 1-sigma cross-track error in the shadow position is 1385 km.

The TNO has an absolute magnitude Hv=7.3
Diameter=201.4 km assuming a 5% albedo -- 12.9 sec chord
Diameter=82.2 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 556130, (2022/09/09 01:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:48.1 -26:28:49  0.9 22.82  78
1Del Oph       16:15:32.2 -03:45:04  2.7  1.40  88
PPM 199363     16:11:01.9 -03:31:30  5.0  0.71  89
PPM 199310     16:08:19.9 -04:21:24  8.2  0.49  89
PPM 199344     16:10:17.2 -04:13:50  9.9  0.04  89
556130         16:10:12.2 -04:12:06 16.8        88
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 556130, (2022/09/09 01:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.82  78
1Del Oph       16:14:20.7 -03:41:43  2.7  1.40  88
PPM 199363     16:09:50.5 -03:28:00  5.0  0.71  89
PPM 199310     16:07:08.2 -04:17:50  8.2  0.49  89
PPM 199344     16:09:05.5 -04:10:20  9.9  0.04  89
556130         16:09:00.4 -04:08:36 16.8        89
Positions are for J2000

Event circumstances last updated at 2022/05/03 00:36:38 UT

Marc W. Buie, Southwest Research Institute

RECON