RECON: TNO occultation with 576256

Event between (576256) 12JH67 and star GA0620:07416186 with event index number of 2523866

Geocentric closest approach at 2023/01/29 17:50:50 UTC

J2000 position of star is 15:40:11.6 -26:18:44
Equinox of date position of star is 15:41:30.4 -26:22:53
Stellar brightness G=17.0, 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 61% illuminated.
TNO apparent brightness V=22.4

TNO is 47.5 AU from the Sun and 47.8 AU from the Earth.
The TNO is moving 14.9 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 359 seconds.
The 1-sigma cross-track error in the shadow position is 2446 km.

The TNO has an absolute magnitude Hv=5.5
Diameter=476.4 km assuming a 5% albedo -- 32.1 sec chord
Diameter=194.5 km assuming a 30% albedo -- 13.1 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 
 
 

Star training set for 576256, (2023/01/29 17:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:49.6 -26:28:52  0.9 11.02 162
7Del Sco       16:01:42.1 -22:41:08  2.3  5.88 170
PPM 264463     15:38:51.9 -26:21:16  6.4  0.61 172
PPM 264490     15:40:07.0 -26:22:18  9.1  0.33 172
576256         15:41:35.1 -26:23:08 17.0       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 576256, (2023/01/29 17:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.02 162
7Del Sco       16:00:20.0 -22:37:19  2.3  5.88 170
PPM 264463     15:37:28.5 -26:16:48  6.4  0.61 172
PPM 264490     15:38:43.6 -26:17:52  9.1  0.33 172
576256         15:40:11.6 -26:18:44 17.0       172
Positions are for J2000

Event circumstances last updated at 2021/10/16 01:14:22 UT

Marc W. Buie, Southwest Research Institute

RECON