RECON: TNO occultation with 11JA32

Event between 11JA32 and star GA0700:33077965 with event index number of 1123825

Geocentric closest approach at 2021/07/12 23:07:42 UTC

J2000 position of star is 19:25:23.3 -19:17:08
Equinox of date position of star is 19:26:37.1 -19:14:33
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 144 degrees from the moon. Moon is 9% illuminated.
TNO apparent brightness V=26.0

TNO is 42.3 AU from the Sun and 41.3 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 692 seconds.
The 1-sigma cross-track error in the shadow position is 5273 km.

The TNO has an absolute magnitude Hv=9.8
Diameter=67.6 km assuming a 5% albedo -- 2.8 sec chord
Diameter=27.6 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 11JA32, (2021/07/12 23:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.9 -26:28:41  0.9 40.97 105
Nunki          18:56:35.9 -26:16:05  2.0  9.86 138
45Rho2Sgr      19:23:06.2 -18:16:01  5.8  1.29 144
PPM 235947     19:25:44.9 -18:53:05  8.2  0.42 144
PPM 235972     19:26:47.9 -19:20:04  9.4  0.10 144
11JA32         19:26:38.9 -19:14:29 16.7       145
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 11JA32, (2021/07/12 23:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 40.97 105
Nunki          18:55:15.9 -26:17:49  2.0  9.86 138
45Rho2Sgr      19:21:51.1 -18:18:32  5.8  1.29 144
PPM 235947     19:24:29.6 -18:55:41  8.2  0.42 144
PPM 235972     19:25:32.3 -19:22:43  9.4  0.10 144
11JA32         19:25:23.3 -19:17:08 16.7       144
Positions are for J2000

Event circumstances last updated at 2021/01/04 21:16:17 UT

Marc W. Buie, Southwest Research Institute

RECON