RECON: TNO occultation with 500886

Event between (500886) 13JN65 and star GA0740:05874799 with event index number of 221585

Geocentric closest approach at 2019/05/08 18:38:44 UTC

J2000 position of star is 16:13:33.5 -15:19:07
Equinox of date position of star is 16:14:38.5 -15:21:58
Stellar brightness G=16.3, use SENSEUP=128
Star is 149 degrees from the moon. Moon is 16% illuminated.
TNO apparent brightness V=23.5

TNO is 41.2 AU from the Sun and 40.2 AU from the Earth.
The TNO is moving 23.8 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 87 seconds.
The 1-sigma cross-track error in the shadow position is 1716 km.

The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 8.4 sec chord
Diameter=81.5 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 500886, (2019/05/08 18:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.8 -26:28:24  0.9 11.71 154
8Bet1Sco       16:06:33.9 -19:51:25  2.6  4.89 148
PPM 231511     16:20:06.1 -14:55:07  5.8  1.39 150
PPM 231371     16:14:16.9 -15:09:55  7.2  0.22 148
PPM 231373     16:14:19.6 -15:14:55  9.5  0.14 148
500886         16:14:39.3 -15:22:00 16.3       149
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 500886, (2019/05/08 18:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.71 154
8Bet1Sco       16:05:26.2 -19:48:20  2.6  4.89 148
PPM 231511     16:19:00.4 -14:52:22  5.8  1.39 150
PPM 231371     16:13:11.2 -15:07:02  7.2  0.22 148
PPM 231373     16:13:13.8 -15:12:02  9.5  0.14 148
500886         16:13:33.5 -15:19:07 16.3       149
Positions are for J2000

Event circumstances last updated at 2019/02/12 07:39:37 UT

Marc W. Buie, Southwest Research Institute

RECON