RECON: TNO occultation with 531142

Event between (531142) 12FL84 and star GA0660:06867988 with event index number of 2780061

Geocentric closest approach at 2029/06/05 12:53:57 UTC

J2000 position of star is 15:39:01.3 -22:04:26
Equinox of date position of star is 15:40:27.5 -22:09:08
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 124 degrees from the moon. Moon is 36% illuminated.
Apparent brightness V=23.2

Object is 43.3 AU from the Sun and 42.3 AU from the Earth.
Apparent velocity is 23.3 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 288 seconds.
The 1-sigma cross-track error in the shadow position is 5874 km.

The object has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 11.3 sec chord
Diameter=107.4 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 531142, (2029/06/05 12:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:13.0 -26:29:41  0.9 12.28 112
7Del Sco       16:02:04.7 -22:42:11  2.3  4.96 119
PPM 264480     15:39:59.3 -21:06:40  5.9  1.07 124
PPM 264464     15:39:14.9 -22:12:42  7.4  0.35 124
PPM 264475     15:39:49.0 -22:10:11  9.7  0.22 124
531142         15:40:44.9 -22:10:05 14.6       124
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 531142, (2029/06/05 12:54UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 12.28 112
7Del Sco       16:00:20.0 -22:37:19  2.3  4.96 119
PPM 264480     15:38:16.4 -21:01:00  5.9  1.07 124
PPM 264464     15:37:31.3 -22:07:01  7.4  0.35 124
PPM 264475     15:38:05.4 -22:04:30  9.7  0.22 124
531142         15:39:01.3 -22:04:26 14.6       124
Positions are for J2000

Event circumstances last updated at 2024/06/27 21:00:37 UT

Marc W. Buie, Southwest Research Institute

RECON