RECON: TNO occultation with 576257

Event between (576257) 12JD68 and star GA0960:08157931 with event index number of 2800775

Geocentric closest approach at 2029/06/24 15:16:15 UTC

J2000 position of star is 18:33:32.8 +06:51:52
Equinox of date position of star is 18:34:39.7 +06:53:00
Stellar brightness G=14.3, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 41 degrees from the moon. Moon is 97% illuminated.
Apparent brightness V=22.8

Object is 28.3 AU from the Sun and 27.4 AU from the Earth.
Apparent velocity is 22.8 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 381 seconds.
The 1-sigma cross-track error in the shadow position is 1392 km.

The object has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 6.1 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 
 
 

Star training set for 576257, (2029/06/24 15:16UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:56.1 +38:48:44  0.0 31.93  68
60Bet Oph      17:44:55.8 +04:33:25  2.8 12.67  32
PPM 166175     18:38:05.2 +06:41:51  5.8  0.79  41
PPM 166036     18:33:27.7 +06:48:11  7.6  0.39  40
PPM 166072     18:34:38.2 +06:45:40  8.8  0.15  40
576257         18:34:58.7 +06:53:20 14.3        41
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 576257, (2029/06/24 15:16UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:08  0.0 31.93  68
60Bet Oph      17:43:28.3 +04:34:06  2.8 12.67  32
PPM 166175     18:36:39.1 +06:40:16  5.8  0.79  41
PPM 166036     18:32:01.7 +06:46:47  7.6  0.39  40
PPM 166072     18:33:12.1 +06:44:13  8.8  0.15  40
576257         18:33:32.8 +06:51:52 14.3        40
Positions are for J2000

Event circumstances last updated at 2022/12/15 04:09:29 UT

Marc W. Buie, Southwest Research Institute

RECON