RECON: TNO occultation with 471318

Event between (471318) 11JF31 and star GA0700:05890327 with event index number of 258558

Geocentric closest approach at 2020/05/17 13:14:37 UTC

J2000 position of star is 15:40:30.9 -19:17:38
Equinox of date position of star is 15:41:36.0 -19:21:12
Stellar brightness G=16.9, use SENSEUP=128
Star is 122 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=21.4

TNO is 42.5 AU from the Sun and 41.5 AU from the Earth.
The TNO is moving 25.6 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 448 seconds.
The 1-sigma cross-track error in the shadow position is 5165 km.

The TNO has an absolute magnitude Hv=5.2
Diameter=549.6 km assuming a 5% albedo -- 21.5 sec chord
Diameter=224.4 km assuming a 30% albedo -- 8.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 471318, (2020/05/17 13:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.6 -26:28:32  0.9 13.32 109
7Del Sco       16:01:32.5 -22:40:41  2.3  5.70 117
41 Lib         15:40:05.2 -19:22:03  5.3  0.38 123
PPM 230612     15:43:05.8 -19:31:37  8.2  0.37 122
PPM 230578     15:41:56.0 -19:28:04  9.4  0.12 122
471318         15:41:41.4 -19:21:30 16.9       122
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, (2020/05/17 13:15UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 13.32 109
7Del Sco       16:00:20.0 -22:37:18  2.3  5.70 117
41 Lib         15:38:54.7 -19:18:08  5.3  0.38 123
PPM 230612     15:41:55.2 -19:27:46  8.2  0.37 122
PPM 230578     15:40:45.4 -19:24:12  9.4  0.12 122
471318         15:40:30.9 -19:17:38 16.9       122
Positions are for J2000

Event circumstances last updated at 2018/10/26 21:07:39 UT

Marc W. Buie, Southwest Research Institute

RECON