RECON: TNO occultation with 471136

Event between (471136) 10EO65 and star GA0580:32374489 with event index number of 1138909

Geocentric closest approach at 2021/07/10 11:21:13 UTC

J2000 position of star is 18:11:29.8 -31:36:24
Equinox of date position of star is 18:12:52.0 -31:36:02
Stellar brightness G=13.6, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 159 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=21.4

TNO is 15.5 AU from the Sun and 14.5 AU from the Earth.
The TNO is moving 19.7 km/sec on the sky relative to the star, or, 6.8 arcsec/hr.
The 1-sigma error in the time of the event is 234 seconds.
The 1-sigma cross-track error in the shadow position is 960 km.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.8 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 471136, (2021/07/10 11:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.8 -26:28:41  0.9 22.85 137
Kap Sco        17:43:58.7 -39:02:20  2.4  9.49 151
PPM 297335     18:11:29.1 -30:43:23  5.2  0.93 159
PPM 297341     18:11:43.9 -31:31:36  7.8  0.26 159
471136         18:12:53.6 -31:36:01 13.6       159
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 471136, (2021/07/10 11:21UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.85 137
Kap Sco        17:42:29.3 -39:01:49  2.4  9.49 151
PPM 297335     18:10:05.8 -30:43:43  5.2  0.93 159
PPM 297341     18:10:20.1 -31:31:57  7.8  0.26 159
471136         18:11:29.8 -31:36:24 13.6       159
Positions are for J2000

Event circumstances last updated at 2021/02/07 20:48:25 UT

Marc W. Buie, Southwest Research Institute

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