RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1000:19565378 with event index number of 2750125

Geocentric closest approach at 2029/05/11 03:53:15 UTC

J2000 position of star is 21:01:01.4 +10:32:38
Equinox of date position of star is 21:02:08.0 +10:38:05
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 64 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=22.2

TNO is 30.4 AU from the Sun and 30.4 AU from the Earth.
The TNO is moving 9.7 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 291 seconds.
The 1-sigma cross-track error in the shadow position is 4228 km.

The TNO has an absolute magnitude Hv=7.2
Diameter=229.1 km assuming a 5% albedo -- 22.9 sec chord
Diameter=93.5 km assuming a 30% albedo -- 9.3 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 
 
 

Star training set for 523700, (2029/05/11 03:53UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:26.0 +45:23:11  1.3 34.99  66
Tarazed        19:47:39.3 +10:41:12  2.7 18.37  82
5Gam Equ       21:11:46.1 +10:15:06  4.7  2.33  62
PPM 171075     21:00:30.9 +10:06:08  8.4  0.73  64
PPM 139463     21:02:54.1 +10:51:09  9.6  0.22  64
PPM 139439     21:02:04.8 +10:37:24 11.0  0.10  64
523700         21:02:26.5 +10:39:37 16.3        63
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 523700, (2029/05/11 03:53UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 34.99  66
Tarazed        19:46:15.6 +10:36:48  2.7 18.37  82
5Gam Equ       21:10:20.6 +10:07:50  4.7  2.33  62
PPM 171075     20:59:05.5 +09:59:12  8.4  0.73  64
PPM 139463     21:01:29.0 +10:44:09  9.6  0.22  64
PPM 139439     21:00:39.6 +10:30:25 11.0  0.10  64
523700         21:01:01.4 +10:32:38 16.3        64
Positions are for J2000

Event circumstances last updated at 2022/12/12 05:06:57 UT

Marc W. Buie, Southwest Research Institute

RECON