RECON: TNO occultation with 13MY11

Event between 13MY11 and star UC4-337-203071 with event index number of 133746

Geocentric closest approach at 2018/08/07 04:36:15 UTC

J2000 position of star is 22:16:59.6 -22:47:02
Equinox of date position of star is 22:17:57.0 -22:41:49
Stellar brightness R=13.9, use SENSEUP=64
Star is 107 degrees from the moon. Moon is 24% illuminated.
TNO apparent brightness V=22.0

TNO is 22.9 AU from the Sun and 21.9 AU from the Earth.
The TNO is moving 21.3 km/sec on the sky relative to the star, or, 4.8 arcsec/hr.
The 1-sigma error in the time of the event is 608 seconds.
The 1-sigma cross-track error in the shadow position is 5770 km.

The TNO has an absolute magnitude Hv=8.4
Diameter=125.9 km assuming a 5% albedo -- 5.9 sec chord
Diameter=51.4 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 13MY11, (2018/08/07 04:36UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:40.4 -29:31:24  1.2 11.39 100
PPM 273597     22:18:01.7 -23:02:50  6.3  0.36 107
PPM 273576     22:17:09.0 -22:54:58  7.9  0.30 107
PPM 273602     22:18:22.4 -22:41:18  9.8  0.08 107
13MY11         22:18:01.3 -22:41:26 13.9       107
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 13MY11, (2018/08/07 04:36UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 11.39 100
PPM 273597     22:16:59.9 -23:08:26  6.3  0.36 107
PPM 273576     22:16:07.3 -23:00:34  7.9  0.30 107
PPM 273602     22:17:20.7 -22:46:54  9.8  0.08 107
13MY11         22:16:59.6 -22:47:02 13.9       107
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:30:53 UT

Marc W. Buie, Southwest Research Institute

RECON