RECON: TNO occultation with 560552

Event between (560552) 15GO50 and star GA0640:06125656 with event index number of 2306855

Geocentric closest approach at 2027/03/04 14:46:30 UTC

J2000 position of star is 13:10:16.3 -25:11:47
Equinox of date position of star is 13:11:36.3 -25:19:34
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 95 degrees from the moon. Moon is 13% illuminated.
Apparent brightness V=22.3

Object is 39.5 AU from the Sun and 38.8 AU from the Earth.
Apparent velocity is 17.8 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 276 seconds.
The 1-sigma cross-track error in the shadow position is 2289 km.

The object has an absolute magnitude Hv=6.3
Diameter=317.7 km assuming a 5% albedo -- 18.3 sec chord
Diameter=129.7 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 560552, (2027/03/04 14:43UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:37.7 -11:18:08  1.0 14.47  98
9Bet Crv       12:35:49.2 -23:32:48  2.6  8.37 103
PPM 261317     13:13:08.3 -26:41:44  6.5  1.39  94
PPM 261284     13:11:40.1 -25:40:54  8.1  0.34  95
PPM 261296     13:12:13.2 -25:16:55  9.5  0.12  95
560552         13:11:45.1 -25:20:25 17.0        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 560552, (2027/03/04 14:43UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 14.47  98
9Bet Crv       12:34:23.2 -23:23:49  2.6  8.37 103
PPM 261317     13:11:39.1 -26:33:06  6.5  1.39  94
PPM 261284     13:10:11.2 -25:32:15  8.1  0.34  95
PPM 261296     13:10:44.4 -25:08:17  9.5  0.12  95
560552         13:10:16.3 -25:11:47 17.0        95
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:27:10 UT

Marc W. Buie, Southwest Research Institute

RECON