RECON: TNO occultation with 11LJ29

Event between 11LJ29 and star GA0660:09256692 with event index number of 1575001

Geocentric closest approach at 2021/05/28 19:07:47 UTC

J2000 position of star is 17:04:16.6 -23:03:19
Equinox of date position of star is 17:05:33.0 -23:04:59
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 23 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=22.0

TNO is 45.3 AU from the Sun and 44.3 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 152 seconds.
The 1-sigma cross-track error in the shadow position is 1785 km.

The TNO has an absolute magnitude Hv=5.5
Diameter=472.1 km assuming a 5% albedo -- 19.2 sec chord
Diameter=192.7 km assuming a 30% albedo -- 7.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 11LJ29, (2021/05/28 19:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.4 -26:28:40  0.9  8.60  31
35Eta Oph      17:11:36.4 -15:45:00  2.6  7.47  24
PPM 266403     17:07:28.6 -21:35:33  6.3  1.55  23
PPM 266324     17:04:39.3 -23:10:50  7.5  0.23  23
PPM 266339     17:05:13.3 -22:54:35  8.8  0.19  23
11LJ29         17:05:34.3 -23:05:01 15.9        23
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 11LJ29, (2021/05/28 19:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  8.60  31
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.47  24
PPM 266403     17:06:11.8 -21:33:54  6.3  1.55  23
PPM 266324     17:03:21.6 -23:09:06  7.5  0.23  23
PPM 266339     17:03:55.8 -22:52:52  8.8  0.19  23
11LJ29         17:04:16.6 -23:03:19 15.9        23
Positions are for J2000

Event circumstances last updated at 2021/01/21 21:22:16 UT

Marc W. Buie, Southwest Research Institute

RECON