RECON: TNO occultation with 471318

Event between (471318) 11JF31 and star UC4-351-075509 with event index number of 183159

Geocentric closest approach at 2019/03/29 23:15:03 UTC

J2000 position of star is 15:38:39.5 -19:53:43
Equinox of date position of star is 15:39:41.7 -19:57:11
Stellar brightness R=14.9, use SENSEUP=128
Star is 62 degrees from the moon. Moon is 33% illuminated.
TNO apparent brightness V=21.6

TNO is 42.4 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 15.6 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 614 seconds.
The 1-sigma cross-track error in the shadow position is 3150 km.

The TNO has an absolute magnitude Hv=5.2
Diameter=549.6 km assuming a 5% albedo -- 35.2 sec chord
Diameter=224.4 km assuming a 30% albedo -- 14.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 471318, (2019/03/29 23:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.4 -26:28:23  0.9 13.36  49
7Del Sco       16:01:28.5 -22:40:30  2.3  5.74  56
41 Lib         15:40:01.2 -19:21:50  5.3  0.60  62
PPM 230514     15:39:31.9 -19:58:32  7.1  0.06  62
471318         15:39:46.3 -19:57:26 14.9        61
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 471318, (2019/03/29 23:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.36  49
7Del Sco       16:00:20.0 -22:37:18  2.3  5.74  56
41 Lib         15:38:54.7 -19:18:08  5.3  0.60  62
PPM 230514     15:38:25.1 -19:54:49  7.1  0.06  62
471318         15:38:39.5 -19:53:43 14.9        62
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:49:16 UT

Marc W. Buie, Southwest Research Institute

RECON